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: Reaction formation is a defense mechanism where a person acts opposite to their true feelings.
A) Sublimation
B) Projection
C) Reaction formation
D) Rationalization
✅ Correct Answer: C
Explanation: This occurs when unacceptable impulses are transformed into their opposites.
Q: The retina contains rods and cones for detecting light and color.
A) Iris
B) Retina
C) Cornea
D) Optic nerve
✅ Correct Answer: B
Explanation: The retina processes visual input with light-sensitive photoreceptor cells.
Q: The autonomic nervous system controls involuntary body functions.
A) Peripheral system
B) Somatic system
C) Autonomic system
D) Central system
✅ Correct Answer: C
Explanation: It regulates automatic processes such as heart rate and digestion.
Q: The bystander effect is the tendency for individuals to be less likely to help in a crowd.
A) Altruism
B) Bystander effect
C) Social responsibility
D) Group bias
✅ Correct Answer: B
Explanation: People assume others will take action, so they do nothing in group settings.
Q: Operant conditioning uses rewards and punishments to influence behavior.
A) Social learning
B) Insight learning
C) Operant conditioning
D) Vicarious learning
✅ Correct Answer: C
Explanation: Skinner’s operant conditioning focuses on consequences shaping behavior.