Human anatomy, biology, chemistry, and scientific reasoning
Science is the largest and often toughest section of the ATI TEAS 7, so practicing real TEAS science questions is essential. Below you’ll find free TEAS science practice questions with answers and explanations — weighted toward anatomy and physiology, since A&P is roughly 40% of the section — followed by study guides for every science topic. The section has 50 questions (44 scored) and a 60-minute limit, so work through these TEAS science questions with answers to build both accuracy and speed.
Try these real, exam-style TEAS science questions. Tap “Show answer” to reveal the correct choice and a full explanation.
Q1Which organ in the digestive system is primarily responsible for the absorption of nutrients?
Answer: Small Intestine
Why: The small intestine (specifically via villi/microvilli) is the primary site for nutrient absorption. The large intestine absorbs water.
Q2Which hormone is secreted by the pancreas to lower blood glucose levels?
Answer: Insulin
Why: Insulin is released by beta cells in the pancreas when blood sugar is high; it helps cells absorb glucose.
Q3A student measures the growth of bacteria at different temperatures. What is the independent variable in this experiment?
Answer: The temperature
Why: The Independent Variable is the factor the scientist changes/manipulates (Temperature) to see its effect.
Q4Which part of the neuron is responsible for receiving signals from other cells?
Answer: Dendrite
Why: Dendrites are the branch-like structures that receive neurotransmitters/signals from other neurons.
Q5Balance the following chemical equation: 2H₂ + O₂ → ?
Answer: 2H₂O
Why: We have 4 H and 2 O on the left. To have 4 H and 2 O on the right, we need 2 molecules of water (2H₂O).
Q6Which type of immunity is produced by a vaccine?
Answer: Artificial Active
Why: Vaccines provide Artificial Active immunity. 'Artificial' because it is a medical intervention, 'Active' because the body produces its own antibodies.
Q7Which macromolecule contains genetic information?
Answer: Nucleic Acids
Why: Nucleic Acids (DNA and RNA) store and transmit genetic information.
Q8Which muscle type is found in the walls of hollow organs like the stomach and blood vessels?
Answer: Smooth muscle
Why: Smooth muscle is involuntary and found in the walls of hollow organs (stomach, intestines, vessels).
Q9What type of bond involves the sharing of electron pairs between atoms?
Answer: Covalent
Why: Covalent bonds involve sharing electrons. Ionic bonds involve transferring electrons.
Q10Which tool measures mass?
Answer: Triple Beam Balance
Why: A balance (digital or triple beam) is used to measure mass. A cylinder measures volume.
TEAS 7 science has 44 scored questions across these reporting categories:
Because anatomy and physiology dominate the section, front-load your practice there. Use the free science questions below to find weak body systems, then read the explanations closely — TEAS science rewards recognizing structures, functions, and cause-and-effect relationships.