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BIOS 255 WEEK 6 QUIZ EXAM 4 (Latest Update 2025 / 2026) Anatomy and Physiology IV with Lab | Questions & Answers | 100% Correct | Grade A – Chamberlain

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BIOS 255 WEEK 6 QUIZ EXAM 4 (Latest Update 2025 / 2026) Anatomy and Physiology IV with Lab | Questions & Answers | 100% Correct | Grade A – Chamberlain

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BIOS 255 WEEK 6 QUIZ EXAM 4 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain

1. Which blood cells fight infection?
r. r. r. r.




A. Red blood cells
r. r. r.




B. White blood cells
r. r. r.




C. Platelets
r.




D. Plasma
r.




Correct Answer: Br. r.




Rationale: White blood cells are responsible for immune defense.
r. r. r. r. r. r. r. r.




2. Which component of blood aids clotting?
r. r. r. r. r. r.




A. Red blood cells
r. r. r.




B. Platelets
r.




C. Plasma
r.




D. White blood cells
r. r. r.




Correct Answer: Br. r.




Rationale: Platelets aggregate to form blood clots.
r. r. r. r. r. r.




3. Which part of the heart prevents backflow?
r. r. r. r. r. r. r.

,A. Arteries
r.




B. Valves
r.




C. Veins
r.




D. Capillaries
r.




Correct Answer: B r. r.




Rationale: Valves ensure blood flows in one direction.
r. r. r. r. r. r. r.




4. Which heart chamber receives oxygenated blood from lungs?
r. r. r. r. r. r. r. r.




A. Right atrium
r. r.




B. Left atrium
r. r.




C. Right ventricle
r. r.




D. Left ventricle
r. r.




Correct Answer: B r. r.




Rationale: The left atrium receives oxygen-rich blood from the
r. r. r. r. r. r. r. r.




lungs.
r.




5. Which heart chamber pumps blood to the body?
r. r. r. r. r. r. r. r.




A. Right atrium
r. r.




B. Left atrium
r. r.




C. Left ventricle
r. r.




D. Right ventricle
r. r.




Correct Answer: C r. r.




Rationale: Left ventricle pumps oxygenated blood to systemic
r. r. r. r. r. r. r.




circulation.
r.




6. What is systolic pressure?
r. r. r. r.

,A. Heart relaxation pressure
r. r. r.




B. Heart contraction pressure
r. r. r.




C. Average pressure
r. r.




D. Diastolic pressure
r. r.




Correct Answer: B
r. r.




Rationale: Systolic is the pressure when the heart contracts.
r. r. r. r. r. r. r. r.




7. What is diastolic pressure?
r. r. r. r.




A. Heart contraction pressure
r. r. r.




B. Heart relaxation pressure
r. r. r.




C. Average pressure
r. r.




D. Pulse pressure
r. r.




Correct Answer: B
r. r.




Rationale: Diastolic is pressure when heart relaxes.
r. r. r. r. r. r.




8. Which blood vessel carries blood away from the heart?
r. r. r. r. r. r. r. r. r.




A. Vein
r.




B. Artery
r.




C. Capillary
r.




D. Lymph vessel
r. r.




Correct Answer: B
r. r.




Rationale: Arteries transport blood from the heart to tissues.
r. r. r. r. r. r. r. r.




9. Which blood vessel carries blood to the heart?
r. r. r. r. r. r. r. r.

, A. Artery
r.




B. Vein
r.




C. Capillary
r.




D. Lymph vessel
r. r.




Correct Answer: B r. r.




Rationale: Veins return blood to the heart.
r. r. r. r. r. r.




10. What is the function of plasma?
r. r. r. r. r. r.




A. Transport nutrients and hormones
r. r. r. r.




B. Carry oxygen only
r. r. r.




C. Fight infection
r. r.




D. Clot blood
r. r.




Correct Answer: A r. r.




Rationale: Plasma transports nutrients, hormones, and waste
r. r. r. r. r. r.




products.
r.




11. Which component of blood carries oxygen?
r. r. r. r. r. r.




A. Plasma
r.




B. White blood cells
r. r. r.




C. Platelets
r.




D. Red blood cells
r. r. r.




Correct Answer: D r. r.




Rationale: Hemoglobin in red blood cells carries oxygen.
r. r. r. r. r. r. r.




12. What is anemia?
r. r. r.

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