Physiology MCQs
Physiology MCQs help medical and dental students master body functions across cardiovascular, respiratory, renal, digestive, endocrine, and neurophysiology systems. Ideal for MDCAT, NTS, USMLE, and FCPS, these quizzes boost retention and exam success.
Q: The reflex that prevents overinflation of the lungs
A) Hering–Breuer reflex
B) Withdrawal reflex
C) Babinski reflex
D) Moro reflex
✅ Correct Answer: A
Explanation: The Hering–Breuer reflex inhibits inspiration when lungs are overstretched.
Q: Vasodilation in exercising muscles is caused by
A) Accumulation of metabolites
B) Increased sympathetic tone
C) Increased oxygen
D) Decreased lactic acid
✅ Correct Answer: A
Explanation: Metabolites like CO₂ and adenosine promote local vasodilation.
Q: Sperm maturation primarily occurs in the
A) Vas deferens
B) Epididymis
C) Prostate
D) Seminal vesicle
✅ Correct Answer: B
Explanation: Sperm gain motility and are stored in the epididymis before ejaculation.
Q: The major site of hematopoiesis in adults
A) Kidney
B) Bone marrow
C) Liver
D) Spleen
✅ Correct Answer: B
Explanation: Red bone marrow continuously produces blood cells throughout life.
Q: Primary taste sensed at the back of the tongue
A) Sweet
B) Bitter
C) Sour
D) Salty
✅ Correct Answer: B
Explanation: Bitter taste is primarily detected by receptors at the back of the tongue.