TEAS 8 (TEST OF ESSENTIAL ACADEMIC
SKILLS) EXAM PRACTICE QUESTIONS
WITH CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which structure is responsible for pumping oxygenated blood to the rest of the
body?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
CORRECT ANSWER: D — Left ventricle
RATIONALE: The left ventricle has the thickest muscular wall and pumps oxygen-rich blood
through the aorta to the systemic circulation.
2. Which organ is primarily responsible for filtering blood and producing urine?
A. Liver
B. Kidneys
C. Pancreas
D. Spleen
CORRECT ANSWER: B — Kidneys
RATIONALE: The kidneys remove waste products, regulate fluid and electrolyte balance, and
produce urine.
3. Which blood vessel carries oxygen-rich blood from the lungs to the heart?
A. Pulmonary artery
B. Superior vena cava
C. Pulmonary vein
D. Inferior vena cava
,CORRECT ANSWER: C — Pulmonary vein
RATIONALE: Pulmonary veins are the only veins that normally carry oxygenated blood,
transporting it from the lungs to the left atrium.
4. Which organ produces insulin?
A. Gallbladder
B. Liver
C. Pancreas
D. Thyroid gland
CORRECT ANSWER: C — Pancreas
RATIONALE: The beta cells of the pancreas produce insulin, which helps regulate blood glucose
levels.
5. Which part of the cell contains the genetic material?
A. Ribosome
B. Nucleus
C. Golgi apparatus
D. Lysosome
CORRECT ANSWER: B — Nucleus
RATIONALE: The nucleus contains DNA and directs the cell's activities.
6. Which body system protects the body against infection?
A. Digestive system
B. Immune system
C. Endocrine system
D. Skeletal system
CORRECT ANSWER: B — Immune system
RATIONALE: The immune system identifies and destroys pathogens that can cause disease.
, 7. Gas exchange occurs primarily in which structure of the lungs?
A. Bronchi
B. Trachea
C. Alveoli
D. Bronchioles
CORRECT ANSWER: C — Alveoli
RATIONALE: The alveoli are tiny air sacs where oxygen enters the blood and carbon dioxide
leaves the bloodstream.
8. Which electrolyte is most important for normal cardiac muscle contraction?
A. Potassium
B. Chloride
C. Phosphate
D. Sulfate
CORRECT ANSWER: A — Potassium
RATIONALE: Potassium plays a critical role in cardiac electrical conduction and muscle
contraction.
9. Which chamber of the heart receives oxygen-poor blood from the body?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
CORRECT ANSWER: C — Right atrium
RATIONALE: The right atrium receives deoxygenated blood from the superior and inferior vena
cava.
10. Which hormone regulates blood glucose by lowering it?
A. Glucagon
B. Cortisol
SKILLS) EXAM PRACTICE QUESTIONS
WITH CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which structure is responsible for pumping oxygenated blood to the rest of the
body?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
CORRECT ANSWER: D — Left ventricle
RATIONALE: The left ventricle has the thickest muscular wall and pumps oxygen-rich blood
through the aorta to the systemic circulation.
2. Which organ is primarily responsible for filtering blood and producing urine?
A. Liver
B. Kidneys
C. Pancreas
D. Spleen
CORRECT ANSWER: B — Kidneys
RATIONALE: The kidneys remove waste products, regulate fluid and electrolyte balance, and
produce urine.
3. Which blood vessel carries oxygen-rich blood from the lungs to the heart?
A. Pulmonary artery
B. Superior vena cava
C. Pulmonary vein
D. Inferior vena cava
,CORRECT ANSWER: C — Pulmonary vein
RATIONALE: Pulmonary veins are the only veins that normally carry oxygenated blood,
transporting it from the lungs to the left atrium.
4. Which organ produces insulin?
A. Gallbladder
B. Liver
C. Pancreas
D. Thyroid gland
CORRECT ANSWER: C — Pancreas
RATIONALE: The beta cells of the pancreas produce insulin, which helps regulate blood glucose
levels.
5. Which part of the cell contains the genetic material?
A. Ribosome
B. Nucleus
C. Golgi apparatus
D. Lysosome
CORRECT ANSWER: B — Nucleus
RATIONALE: The nucleus contains DNA and directs the cell's activities.
6. Which body system protects the body against infection?
A. Digestive system
B. Immune system
C. Endocrine system
D. Skeletal system
CORRECT ANSWER: B — Immune system
RATIONALE: The immune system identifies and destroys pathogens that can cause disease.
, 7. Gas exchange occurs primarily in which structure of the lungs?
A. Bronchi
B. Trachea
C. Alveoli
D. Bronchioles
CORRECT ANSWER: C — Alveoli
RATIONALE: The alveoli are tiny air sacs where oxygen enters the blood and carbon dioxide
leaves the bloodstream.
8. Which electrolyte is most important for normal cardiac muscle contraction?
A. Potassium
B. Chloride
C. Phosphate
D. Sulfate
CORRECT ANSWER: A — Potassium
RATIONALE: Potassium plays a critical role in cardiac electrical conduction and muscle
contraction.
9. Which chamber of the heart receives oxygen-poor blood from the body?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
CORRECT ANSWER: C — Right atrium
RATIONALE: The right atrium receives deoxygenated blood from the superior and inferior vena
cava.
10. Which hormone regulates blood glucose by lowering it?
A. Glucagon
B. Cortisol
