TEAS Science Cheat Sheet and Anatomy Diagrams

Use this TEAS Science cheat sheet for quick review after you have studied the underlying material. It covers the body systems, cell biology, genetics, macromolecules, chemistry, and scientific reasoning topics listed in the ATI TEAS 7 Science outline.

A cheat sheet can help you recall a process. It cannot explain a topic you have never learned. When a diagram or table feels unfamiliar, return to a full Science lesson before attempting more questions.

Last reviewed: July 13, 2026

ATI TEAS 7 Science section at a glance

The Science section contains 50 delivered questions and allows 60 minutes. Forty-four questions are scored. The other six are unidentified pretest questions that do not contribute to the official score.

Science content area	Scored questions	Share of scored exam
Human Anatomy and Physiology	18	12%
Biology	9	6%
Chemistry	8	5%
Scientific Reasoning	9	6%
Total Science	44	29%

Human Anatomy and Physiology is the largest Science sub-content area, but more than half of the scored Science questions come from Biology, Chemistry, and Scientific Reasoning combined. Prepare all four areas.

How to use this Science cheat sheet

Work through one section at a time.

1. Read the diagram or table.
2. Cover it.
3. Recreate the process from memory.
4. Explain each step aloud.
5. Answer a few questions without looking.
6. Return to the full lesson when you cannot explain why a step occurs.

Keep the diagrams simple. A hand-drawn heart with correctly placed arrows teaches more than a polished image you only look at.

Body organization and homeostasis

The human body can be organized from small structures to larger systems:

Atoms → molecules → organelles → cells → tissues → organs → organ systems → organism

A tissue contains similar cells working together. Several tissues form an organ. Organs cooperate within a body system.

Four basic tissue types

Tissue	Main role	Examples
Epithelial	Covers surfaces, lines spaces, forms glands	Skin surface, intestinal lining
Connective	Supports, binds, stores, transports	Bone, blood, cartilage, fat
Muscle	Produces movement	Skeletal, cardiac, smooth muscle
Nervous	Carries and processes signals	Brain, spinal cord, peripheral nerves

Homeostasis

Homeostasis keeps internal conditions within a workable range.

A typical negative-feedback loop follows this pattern:

Change in condition → receptor detects change → control center compares it with the set range → effector responds → condition moves back toward the range

Body-temperature control and blood-glucose regulation are common examples.

Negative feedback reverses a disturbance. Positive feedback strengthens a process until a specific event ends it, as occurs during labor or blood clotting.

Anatomical directions

Term	Meaning
Superior	Above
Inferior	Below
Anterior	Toward the front
Posterior	Toward the back
Medial	Toward the midline
Lateral	Away from the midline
Proximal	Closer to the point of attachment
Distal	Farther from the point of attachment
Superficial	Near the body surface
Deep	Farther from the body surface

Remember that anatomical right and left refer to the person being described, not the viewer.

Cardiovascular system diagram

The cardiovascular system includes the heart, blood, and blood vessels. Arteries carry blood away from the heart. Veins carry blood toward it. Oxygen level does not define whether a vessel is an artery or vein.

Blood flow through the heart

Use this sequence as the text version of a heart diagram:

Body tissues
↓
Superior and inferior venae cavae
↓
Right atrium
↓ through the tricuspid valve
Right ventricle
↓ through the pulmonary valve
Pulmonary arteries
↓
Lungs
↓
Pulmonary veins
↓
Left atrium
↓ through the mitral valve
Left ventricle
↓ through the aortic valve
Aorta
↓
Body tissues

What changes in the lungs?

Blood arriving through the pulmonary arteries is relatively low in oxygen and high in carbon dioxide.

At the lungs:

• Carbon dioxide moves from the blood toward the alveoli.
• Oxygen moves from the alveoli into the blood.
• Pulmonary veins return oxygenated blood to the left atrium.

Vessel comparison

Vessel	Direction	General structure
Artery	Away from the heart	Thick, muscular walls
Vein	Toward the heart	Thinner walls; many contain valves
Capillary	Connects small arteries and veins	One-cell-thick exchange surface

Heart conduction sequence

The sinoatrial node normally begins the electrical signal.

SA node → atrial contraction → AV node → bundle of His → bundle branches → Purkinje fibers → ventricular contraction

The conduction system coordinates the timing of atrial and ventricular contraction.

Respiratory system diagram

The respiratory system moves air and exchanges oxygen and carbon dioxide.

Air pathway

Nose or mouth
↓
Pharynx
↓
Larynx
↓
Trachea
↓
Right and left bronchi
↓
Bronchioles
↓
Alveoli

Gas exchange occurs between alveoli and nearby pulmonary capillaries. Oxygen moves into the blood, while carbon dioxide moves into the alveoli for exhalation.

Inhalation

During quiet inhalation:

• The diaphragm contracts and moves downward.
• The thoracic cavity becomes larger.
• Pressure inside the lungs falls relative to outside air.
• Air moves into the lungs.

Exhalation

During quiet exhalation:

• The diaphragm relaxes.
• Thoracic volume decreases.
• Pressure inside the lungs rises.
• Air moves out.

Common point of confusion

Ventilation is the physical movement of air into and out of the lungs.

Gas exchange is the movement of oxygen and carbon dioxide across respiratory surfaces.

They are related, but they are not the same process.

Digestive system diagram

The digestive system breaks food into absorbable molecules, moves nutrients into the body, and eliminates material that is not absorbed. The gastrointestinal tract runs from the mouth to the anus. The liver, pancreas, and gallbladder are accessory digestive organs.

Food pathway

Mouth
↓
Pharynx
↓
Esophagus
↓
Stomach
↓
Small intestine: duodenum → jejunum → ileum
↓
Large intestine: cecum → colon
↓
Rectum
↓
Anus

Main digestive functions

Structure	Main role
Mouth	Mechanical breakdown; begins carbohydrate digestion
Esophagus	Moves food to the stomach by peristalsis
Stomach	Mixes food; begins substantial protein digestion
Small intestine	Main site of chemical digestion and nutrient absorption
Large intestine	Absorbs water and forms feces
Liver	Produces bile and processes absorbed substances
Gallbladder	Stores and concentrates bile
Pancreas	Releases digestive enzymes and bicarbonate into the small intestine

Where most absorption occurs

Most nutrient absorption occurs in the small intestine. Its folds, villi, and microvilli create a large surface area.

The large intestine mainly absorbs water and electrolytes from the remaining material.

Nervous system quick review

The nervous system detects changes, processes information, and directs responses.

Main divisions

Division	Components	Main role
Central nervous system	Brain and spinal cord	Processing and integration
Peripheral nervous system	Nerves outside the CNS	Carries signals to and from the CNS
Somatic nervous system	Skeletal muscle pathways	Voluntary movement and reflexes
Autonomic nervous system	Smooth muscle, cardiac muscle, glands	Involuntary regulation

Sympathetic versus parasympathetic

Sympathetic	Parasympathetic
Supports activity and stress response	Supports rest and digestion
Raises heart rate	Slows heart rate
Dilates airways	Returns airways toward resting tone
Reduces digestive activity temporarily	Promotes digestive activity

Neuron diagram

Dendrites → cell body → axon → axon terminals → synapse

• Dendrites receive signals.
• The cell body contains the nucleus.
• The axon carries the electrical impulse away from the cell body.
• Axon terminals release neurotransmitters.
• A synapse is the space or junction where one cell communicates with another.

Endocrine system quick review

The endocrine system uses hormones carried through the blood to regulate target tissues. Hormones contribute to growth, metabolism, reproduction, stress responses, and homeostasis.

Gland or organ	Selected hormones	Main effect to remember
Pituitary	GH, TSH, ACTH, FSH, LH	Controls growth and stimulates other glands
Thyroid	T3 and T4, calcitonin	Metabolism; calcitonin lowers blood calcium
Parathyroid	PTH	Raises blood calcium
Adrenal cortex	Cortisol, aldosterone	Stress metabolism; sodium and water balance
Adrenal medulla	Epinephrine, norepinephrine	Rapid stress response
Pancreas	Insulin, glucagon	Lowers or raises blood glucose
Ovaries	Estrogen, progesterone	Female reproductive regulation
Testes	Testosterone	Male reproductive regulation
Pineal gland	Melatonin	Sleep-wake timing

Blood-glucose feedback

When blood glucose rises:

Pancreatic beta cells release insulin → cells take up more glucose → the liver stores glucose as glycogen → blood glucose falls

When blood glucose falls:

Pancreatic alpha cells release glucagon → the liver breaks down glycogen and releases glucose → blood glucose rises

Urinary system diagram

The urinary system removes nitrogen-containing wastes, helps control water and electrolyte balance, and contributes to acid-base regulation.

Urine pathway

Kidneys → ureters → urinary bladder → urethra

Nephron sequence

Glomerulus → Bowman’s capsule → proximal convoluted tubule → loop of Henle → distal convoluted tubule → collecting duct

Three processes to separate

Process	Direction
Filtration	Blood into the nephron
Reabsorption	Nephron back into blood
Secretion	Blood into the nephron
Excretion	Urine leaves the body

Filtration begins at the renal corpuscle. The tubules then adjust the filtrate through reabsorption and secretion.

Immune and lymphatic systems

The immune system includes physical barriers, immune cells, proteins, blood, and lymphatic organs. Skin and mucous membranes help block entry, while bone marrow, thymus, lymph nodes, spleen, and other lymphatic tissues support immune-cell development and activity.

Innate versus adaptive immunity

Innate immunity	Adaptive immunity
Present at birth	Develops after exposure
Fast response	Slower first response
Broad recognition	Specific recognition
Includes barriers, inflammation, phagocytes	Includes B cells, T cells, antibodies
No highly specific memory	Produces immunologic memory

B cells and T cells

• B cells can become plasma cells that produce antibodies.
• Helper T cells coordinate immune activity.
• Cytotoxic T cells destroy certain infected or abnormal cells.
• Memory cells support a faster response after later exposure.

Lymphatic functions

The lymphatic system:

• Returns excess tissue fluid to the bloodstream
• Transports absorbed fats from the intestine
• Provides sites where immune cells encounter foreign material

Skeletal and muscular systems

Skeletal functions

The skeletal system provides:

• Support
• Protection
• Leverage for movement
• Mineral storage
• Blood-cell production in red bone marrow

Joint types

Joint type	Typical movement
Fibrous	Little or none
Cartilaginous	Limited
Synovial	Freely movable

Muscle types

Muscle	Control	Location
Skeletal	Mostly voluntary	Attached to bones
Cardiac	Involuntary	Heart
Smooth	Involuntary	Walls of hollow organs and vessels

Sliding-filament idea

During skeletal muscle contraction, thin actin filaments slide past thick myosin filaments. The filaments do not become shorter; the sarcomere shortens as overlap increases.

Calcium exposes binding sites, and ATP supports cross-bridge cycling.

Integumentary system

The integumentary system includes skin, hair, nails, sweat glands, and sebaceous glands.

Its functions include:

• Protection
• Temperature regulation
• Sensation
• Limiting water loss
• Supporting vitamin D production

Skin layers

Layer	Main feature
Epidermis	Outer epithelial layer
Dermis	Connective tissue containing vessels, nerves, follicles, and glands
Hypodermis	Subcutaneous tissue rich in fat and connective tissue

The epidermis does not contain blood vessels. Nutrients reach it by diffusion from vessels in the dermis.

Reproductive systems

Male reproductive pathway

Testes → epididymis → vas deferens → ejaculatory duct → urethra

• Testes produce sperm and testosterone.
• The epididymis stores and supports maturation of sperm.
• The vas deferens transports sperm.
• Accessory glands add fluid to semen.

Female reproductive pathway

Ovary → uterine tube → uterus → cervix → vagina

• Ovaries release oocytes and produce estrogen and progesterone.
• Fertilization most often occurs in a uterine tube.
• Implantation normally occurs in the uterine lining.
• The uterus supports development during pregnancy.

Cell structure and organelles

A generalized animal cell contains a plasma membrane, cytoplasm, a nucleus, and organelles with specialized functions.

Organelle	Function
Nucleus	Stores most cellular DNA
Nucleolus	Produces ribosomal components
Ribosome	Builds proteins
Rough endoplasmic reticulum	Produces and processes many proteins
Smooth endoplasmic reticulum	Lipid production and detoxification
Golgi apparatus	Modifies, sorts, and packages molecules
Mitochondrion	Produces much of the cell’s ATP
Lysosome	Digests and recycles materials
Cell membrane	Controls movement into and out of the cell
Cytoskeleton	Maintains shape and supports movement

Cell-membrane transport

Process	Energy required?	Direction
Simple diffusion	No	High to low concentration
Facilitated diffusion	No	High to low through a membrane protein
Osmosis	No	Water moves across a selectively permeable membrane
Active transport	Yes	Often low to high concentration
Endocytosis	Yes	Material enters in a vesicle
Exocytosis	Yes	Material leaves in a vesicle

DNA, RNA, and protein synthesis diagram

The basic information flow is:

DNA → RNA → protein

Transcription uses DNA as a template to produce RNA. Translation uses the nucleotide sequence in messenger RNA to assemble a protein at a ribosome.

Quick comparison

DNA	RNA
Usually double stranded	Usually single stranded
Contains deoxyribose	Contains ribose
Uses thymine	Uses uracil
Stores genetic information	Helps express genetic information

Protein-synthesis sequence

1. A gene in DNA is transcribed into messenger RNA.
2. Messenger RNA leaves the nucleus.
3. A ribosome reads the messenger RNA codons.
4. Transfer RNA brings amino acids.
5. Peptide bonds join the amino acids.
6. The chain folds into a functional protein.

Mitosis versus meiosis

Mitosis	Meiosis
Produces two cells	Produces four cells
Daughter cells are usually genetically similar	Daughter cells are genetically varied
Maintains chromosome number	Reduces chromosome number by half
Used for growth and repair	Produces gametes
One division	Two divisions

Cell-cycle reminder

Interphase → mitosis → cytokinesis

Most cell growth and DNA replication occur during interphase.

Mitosis separates duplicated chromosomes. Cytokinesis divides the cytoplasm.

Basic genetics

Key terms

Term	Meaning
Gene	A segment of DNA associated with a product or trait
Allele	A version of a gene
Genotype	Allele combination
Phenotype	Observable trait
Homozygous	Two matching alleles
Heterozygous	Two different alleles
Dominant	Expressed with one copy in a simple dominant pattern
Recessive	Usually requires two copies in a simple dominant pattern

Simple Punnett-square example

Suppose B is dominant and b is recessive.

Cross:

[
Bb \times Bb
]

Possible genotypes:

• BB
• Bb
• Bb
• bb

Genotype ratio:

1 BB : 2 Bb : 1 bb

Under simple complete dominance, the phenotype ratio is:

3 dominant : 1 recessive

This ratio describes expected probability, not a guarantee for four actual offspring.

Macromolecules

Macromolecule	Building blocks	Main roles	Examples
Carbohydrates	Monosaccharides	Quick energy and some structure	Glucose, glycogen, starch
Lipids	Glycerol and fatty acids in many lipids	Energy storage, membranes, signaling	Triglycerides, phospholipids, steroids
Proteins	Amino acids	Enzymes, transport, structure, signaling	Hemoglobin, collagen, antibodies
Nucleic acids	Nucleotides	Store and use genetic information	DNA, RNA

Enzymes are usually proteins that lower activation energy. They speed reactions without being consumed by the reaction.

Microorganisms and disease

Microorganism	Basic feature
Bacterium	Prokaryotic cell
Virus	Genetic material inside a protein coat; requires a host cell to reproduce
Fungus	Eukaryotic; includes yeasts and molds
Protozoan	Single-celled eukaryote
Helminth	Parasitic worm

Antibiotics target bacteria. They do not treat viral infections.

A pathogen causes disease. Normal microbiota may live on or in the body without causing disease and can sometimes help block harmful organisms.

Chemistry quick review

The ATI Science outline includes atomic structure, physical properties and changes of matter, chemical reactions, conditions that affect reactions, solutions, acids, and bases.

Atomic structure

Particle	Charge	Location
Proton	+1	Nucleus
Neutron	0	Nucleus
Electron	−1	Electron cloud

• Atomic number = number of protons
• Mass number = protons + neutrons
• Isotopes have the same number of protons but different numbers of neutrons
• Ions form when atoms gain or lose electrons

Elements, compounds, and mixtures

Type	Description
Element	One type of atom
Compound	Elements chemically combined in a fixed ratio
Mixture	Substances physically combined
Solution	Homogeneous mixture
Solvent	Substance doing the dissolving
Solute	Substance being dissolved

Physical versus chemical change

A physical change alters form or state without making a new substance.

Examples:

• Melting
• Freezing
• Cutting
• Dissolving in many common cases

A chemical change produces new substances.

Signs may include:

• Gas production
• Precipitate formation
• Lasting color change
• Energy release or absorption
• New odor

Reaction-rate factors

Reaction rate may increase with:

• Higher temperature
• Greater reactant concentration
• More surface area
• A catalyst

A catalyst lowers activation energy and is not consumed overall.

Acids, bases, and pH

pH	General classification
Below 7	Acidic
7	Neutral
Above 7	Basic or alkaline

A lower pH indicates a greater hydrogen-ion concentration. The pH scale is logarithmic, so a change of one pH unit represents a tenfold change in hydrogen-ion concentration.

Acids donate hydrogen ions under the Brønsted-Lowry definition. Bases accept hydrogen ions.

A buffer resists sharp changes in pH. The body uses several buffer and regulatory systems to keep internal pH within a narrow working range.

Scientific Reasoning quick review

Scientific Reasoning tests whether you can interpret measurements, apply evidence, predict relationships, and understand an investigation.

Variables

Term	Meaning
Independent variable	Factor deliberately changed or compared
Dependent variable	Outcome measured
Controlled variable	Condition kept the same
Confounding variable	Outside factor that may distort the relationship

The independent variable is expected to influence the dependent variable.

Experimental groups

• The experimental group receives the condition being tested.
• The control group provides a comparison.
• A placebo may be used to reduce expectation effects.
• Random assignment helps distribute differences among participants.
• Blinding can reduce bias.

Reliability versus validity

Reliability	Validity
Produces consistent results	Measures what it is intended to measure
Improved by repeated consistent trials	Improved by sound design and appropriate measurement
A measurement can be reliable but invalid	A valid measurement should also be reasonably reliable

Accuracy versus precision

Accuracy	Precision
Closeness to the true value	Closeness of repeated measurements to one another

Measurements can be precise without being accurate when they cluster together far from the true value.

Correlation versus causation

Correlation means two variables change together.

It does not, by itself, prove that one caused the other. A third factor may influence both, the direction may be reversed, or the relationship may be coincidental.

A quick experiment-reading method

When given an investigation:

1. Identify the research question.
2. Find what was changed.
3. Find what was measured.
4. Note what was kept constant.
5. Check the control group.
6. Read the table or graph labels.
7. State only the conclusion supported by the data.

Comparisons students often mix up

Pair	Difference
Artery vs. vein	Away from heart vs. toward heart
Pulmonary artery vs. pulmonary vein	Carries low-oxygen blood to lungs vs. oxygenated blood to heart
Ventilation vs. gas exchange	Movement of air vs. movement of gases across membranes
Insulin vs. glucagon	Lowers blood glucose vs. raises blood glucose
Filtration vs. reabsorption	Blood to nephron vs. nephron to blood
Innate vs. adaptive immunity	Fast and broad vs. specific with memory
Mitosis vs. meiosis	Growth and repair vs. gamete formation
DNA vs. RNA	Long-term information storage vs. roles in gene expression
Diffusion vs. active transport	No energy, down gradient vs. energy required
Acid vs. base	Lower pH vs. higher pH
Accuracy vs. precision	Near true value vs. repeated values close together
Independent vs. dependent variable	Changed factor vs. measured outcome

Quick Science recall questions

Question 1

Which chamber pumps blood into the pulmonary arteries?

Question 2

Where does gas exchange occur in the lungs?

Question 3

Which digestive organ is the main site of nutrient absorption?

Question 4

Which organelle produces most cellular ATP?

Question 5

Which process creates messenger RNA from a DNA template?

Question 6

What type of cell division produces gametes?

Question 7

Which hormone lowers blood glucose?

Question 8

What is the functional unit of the kidney?

Question 9

Which immune cells produce antibodies after differentiating into plasma cells?

Question 10

What happens to reaction rate when a catalyst lowers activation energy?

Question 11

A solution with a pH of 3 is classified as what?

Question 12

In an experiment, what is the dependent variable?

Question 13

What does high precision mean?

Question 14

Can correlation alone establish causation?

Question 15

Which macromolecule is built from amino acids?

Quick recall answers

1. Right ventricle
2. Between the alveoli and pulmonary capillaries
3. Small intestine
4. Mitochondrion
5. Transcription
6. Meiosis
7. Insulin
8. Nephron
9. B lymphocytes or B cells
10. The reaction can proceed faster
11. Acidic
12. The measured outcome
13. Repeated measurements are close to one another
14. No
15. Protein

Apply the cheat sheet in timed Science practice

Close the cheat sheet before starting a timed test. A result is only useful when it reflects what you can recall and apply without help.

Pharmacy Freak offers two free Science tests:

• ATI TEAS 7 Science Practice Test 1
• ATI TEAS 7 Science Practice Test 2

Each test includes:

• 30 questions
• A 36-minute timer
• 12 Anatomy and Physiology questions
• 6 Biology questions
• 6 Chemistry questions
• 6 Scientific Reasoning questions
• Instant scoring
• Explanations for every question
• Topic-wise performance analysis
• A downloadable PDF review
• No login requirement

Why these tests are more useful than a basic score-only quiz

A single percentage may show that you missed nine questions. It does not tell you whether those misses came from Anatomy and Physiology, Chemistry, or interpreting an experiment.

Pharmacy Freak’s Science tests show performance by content area, provide a review for each question, and include explanations. You can download the result as a PDF and return to the exact topics that need work.

That makes them more useful for targeted revision than a quiz that displays a score and ends there. The tests are still independent practice resources. They are not official ATI questions, and their percentages are not official ATI equated scores.

A sensible order

1. Read the relevant section of this cheat sheet.
2. Recreate the diagram or process from memory.
3. Take Science Practice Test 1.
4. Review every missed question.
5. Study the weakest content area in full.
6. Take Science Practice Test 2 later.
7. Compare the topic breakdowns.

Don’t take both tests on the same day simply to collect another score.

Move from Science practice to mixed testing

A Science-only test shows whether you can answer Science questions under a Science timer. It does not show how you perform after Reading and Math or how easily you switch between subjects.

After focused Science review, take a free mixed ATI TEAS practice test.

Pharmacy Freak’s mixed sets contain 50 questions across Reading, Mathematics, Science, and English and Language Usage. They use a 61-minute timer and provide explanations, section-wise results, PDF review, and no-login access.

Use the mixed result to check whether Science remains weak when it appears alongside the other subjects.

You can find the full collection through the ATI TEAS practice-test hub.

When to use a full-length TEAS practice test

Use a full-length test after you have reviewed your major Science weaknesses.

The full-length ATI TEAS 7 practice-test package includes 10 complete 170-question simulations for $9.

Each test has four separately timed sections, 150 scored and 20 unidentified unscored questions, automatic saving, server-controlled timing, Mark for Review, a question navigator, a Math calculator, an optional break, locked completed sections, emailed results, and downloadable PDF reports.

A full-length simulation is better suited to testing endurance and the complete exam flow than a short Science quiz. It should come after content review, not replace it.

Print or save this TEAS Science cheat sheet

This page can be used without a separate download.

To keep a copy:

1. Open your browser’s print menu.
2. Choose portrait orientation.
3. Select “Save as PDF” for a digital copy.
4. Turn off browser headers and footers when they clutter the page.
5. Print only the sections you need for revision.

When diagrams are added to the published page, keep the text flow beneath each image. The written version makes the content usable for screen readers and still works when images fail to load.

Frequently asked questions

How many Science questions are on the ATI TEAS 7?

The Science section delivers 50 questions in 60 minutes. Forty-four are scored, while six are unidentified pretest questions.

What topics are included in ATI TEAS Science?

The four official Science content areas are Human Anatomy and Physiology, Biology, Chemistry, and Scientific Reasoning.

Which TEAS Science area has the most questions?

Human Anatomy and Physiology has 18 scored questions, making it the largest single Science sub-content area. Biology and Scientific Reasoning each have nine scored questions, while Chemistry has eight.

Is this Science cheat sheet enough for the TEAS?

No. It is a revision tool. Use a full Science study guide when you cannot explain a diagram, process, or relationship without looking.

The cheat sheet works best after content study and before timed practice.

Do I need to memorize every anatomy detail?

Focus on the structures, functions, pathways, and system interactions listed in the published ATI outline. Small details are less useful when you cannot follow the main process, such as blood flow or urine formation.

Should I study Anatomy and Physiology before Biology and Chemistry?

Start with your weakest important area. Anatomy and Physiology deserves substantial time because it has the largest number of Science questions, but Biology, Chemistry, and Scientific Reasoning together make up 26 scored Science questions.

Are diagrams included in TEAS Science questions?

ATI TEAS 7 can use hot-spot items and other visual question formats. Students should be ready to interpret labeled structures, graphs, tables, and experimental information.

How can I improve Scientific Reasoning?

Practise identifying the independent variable, dependent variable, control group, constants, and conclusion in each experiment. Read labels and units before interpreting a graph.

Are Pharmacy Freak Science scores official ATI scores?

No. Pharmacy Freak reports practice percentages for study tracking. They are not official ATI equated scores and do not predict admission decisions.

Final Science review checklist

Before moving to a full-length test, check that you can:

• Follow blood through the heart and lungs
• Trace air to the alveoli
• Identify the path of food through the digestive tract
• Explain the basic function of each major body system
• Compare sympathetic and parasympathetic activity
• Match major endocrine glands with their hormones
• Trace urine from the kidney to the urethra
• Compare innate and adaptive immunity
• Distinguish skeletal, cardiac, and smooth muscle
• Identify the functions of major cell organelles
• Compare passive and active transport
• Explain DNA to RNA to protein
• Compare mitosis and meiosis
• Complete a simple Punnett square
• Match macromolecules with their building blocks
• Recognize atoms, ions, compounds, and solutions
• Distinguish physical and chemical changes
• Interpret the pH scale
• Identify experimental variables
• Separate reliability from validity
• Separate accuracy from precision
• Interpret a table or graph without ignoring units
• Complete a timed Science test
• Review every incorrect and unanswered question

Sources and independence statement

The Science question count, timing, scored-question distribution, content areas, and objectives were checked against ATI’s official exam information and ATI TEAS Version 7 content outline on July 13, 2026.

Basic anatomy, physiology, cell biology, molecular biology, and scientific-method explanations were checked against resources hosted by the National Institutes of Health, the National Library of Medicine, NCBI Bookshelf, NIDDK, and SEER Training Modules.

Pharmacy Freak is an independent educational resource and is not affiliated with or endorsed by Assessment Technologies Institute. ATI and TEAS are trademarks of their respective owner.