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ATI TEAS 7 SCIENCE LATEST VERSION 100
QUESTIONS & ANSWERS WITH DETAILED
RATIONALES 2026-2027 EDITION | HIGH-YIELD
CONTENT
---
## SECTION 1: HUMAN ANATOMY & PHYSIOLOGY (Questions 1-
50)
---
**1. Which of the following is the primary function of the
mitochondria?**
a) Protein synthesis
b) Lipid storage
c) ATP production
d) Waste elimination
**Answer: c) ATP production**
*Rationale:* Mitochondria are known as the "powerhouses of the cell"
because they generate adenosine triphosphate (ATP) through cellular
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respiration via the electron transport chain and oxidative
phosphorylation.
---
**2. The left ventricle of the heart pumps blood into which structure?**
a) Pulmonary trunk
b) Superior vena cava
c) Aorta
d) Left atrium
**Answer: c) Aorta**
*Rationale:* The left ventricle pumps oxygenated blood into the aorta to
be distributed to the systemic circulation. The right ventricle pumps
deoxygenated blood into the pulmonary trunk.
---
**3. Which hormone regulates blood glucose levels by promoting the
uptake of glucose into cells?**
a) Glucagon
b) Cortisol
c) Insulin
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d) Thyroxine
**Answer: c) Insulin**
*Rationale:* Insulin, produced by beta cells of the pancreas, lowers
blood glucose by facilitating cellular uptake and storage as glycogen.
Glucagon raises blood glucose.
---
**4. In which part of the nephron does filtration of blood primarily
occur?**
a) Loop of Henle
b) Distal convoluted tubule
c) Glomerulus
d) Collecting duct
**Answer: c) Glomerulus**
*Rationale:* The glomerulus is a capillary network in the renal
corpuscle where blood pressure forces fluid and solutes out of the blood
(filtrate) into Bowman's capsule.
---
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**5. Which type of tissue is responsible for voluntary movement?**
a) Cardiac muscle
b) Smooth muscle
c) Skeletal muscle
d) Adipose tissue
**Answer: c) Skeletal muscle**
*Rationale:* Skeletal muscle is striated and under voluntary control via
somatic motor neurons. Cardiac muscle is involuntary; smooth muscle
lines organs and is involuntary.
---
**6. What is the role of the enzyme amylase found in saliva?**
a) Breakdown of proteins
b) Emulsification of fats
c) Breakdown of starches
d) Neutralization of stomach acid
**Answer: c) Breakdown of starches**
*Rationale:* Salivary amylase (ptyalin) initiates the chemical digestion
of complex carbohydrates (starches) into simpler sugars (maltose) in the
oral cavity.
ATI TEAS 7 SCIENCE LATEST VERSION 100
QUESTIONS & ANSWERS WITH DETAILED
RATIONALES 2026-2027 EDITION | HIGH-YIELD
CONTENT
---
## SECTION 1: HUMAN ANATOMY & PHYSIOLOGY (Questions 1-
50)
---
**1. Which of the following is the primary function of the
mitochondria?**
a) Protein synthesis
b) Lipid storage
c) ATP production
d) Waste elimination
**Answer: c) ATP production**
*Rationale:* Mitochondria are known as the "powerhouses of the cell"
because they generate adenosine triphosphate (ATP) through cellular
,2|Page
respiration via the electron transport chain and oxidative
phosphorylation.
---
**2. The left ventricle of the heart pumps blood into which structure?**
a) Pulmonary trunk
b) Superior vena cava
c) Aorta
d) Left atrium
**Answer: c) Aorta**
*Rationale:* The left ventricle pumps oxygenated blood into the aorta to
be distributed to the systemic circulation. The right ventricle pumps
deoxygenated blood into the pulmonary trunk.
---
**3. Which hormone regulates blood glucose levels by promoting the
uptake of glucose into cells?**
a) Glucagon
b) Cortisol
c) Insulin
,3|Page
d) Thyroxine
**Answer: c) Insulin**
*Rationale:* Insulin, produced by beta cells of the pancreas, lowers
blood glucose by facilitating cellular uptake and storage as glycogen.
Glucagon raises blood glucose.
---
**4. In which part of the nephron does filtration of blood primarily
occur?**
a) Loop of Henle
b) Distal convoluted tubule
c) Glomerulus
d) Collecting duct
**Answer: c) Glomerulus**
*Rationale:* The glomerulus is a capillary network in the renal
corpuscle where blood pressure forces fluid and solutes out of the blood
(filtrate) into Bowman's capsule.
---
, 4|Page
**5. Which type of tissue is responsible for voluntary movement?**
a) Cardiac muscle
b) Smooth muscle
c) Skeletal muscle
d) Adipose tissue
**Answer: c) Skeletal muscle**
*Rationale:* Skeletal muscle is striated and under voluntary control via
somatic motor neurons. Cardiac muscle is involuntary; smooth muscle
lines organs and is involuntary.
---
**6. What is the role of the enzyme amylase found in saliva?**
a) Breakdown of proteins
b) Emulsification of fats
c) Breakdown of starches
d) Neutralization of stomach acid
**Answer: c) Breakdown of starches**
*Rationale:* Salivary amylase (ptyalin) initiates the chemical digestion
of complex carbohydrates (starches) into simpler sugars (maltose) in the
oral cavity.
