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: Contraction of skeletal muscle is initiated by
A) Serotonin
B) Acetylcholine
C) Dopamine
D) GABA
Q: The primary pacemaker of the heart
A) Bundle of His
B) SA node
C) Purkinje fibers
D) AV node
Q: Hemoglobin's oxygen affinity increases in
A) Low pH
B) Low temperature
C) High CO₂
D) High 2,3-BPG
Q: Gas exchange in the lungs takes place at
A) Trachea
B) Bronchioles
C) Alveoli
D) Bronchi
Q: The resting membrane potential of a typical neuron is about
A) −70 mV
B) 0 mV
C) +30 mV
D) −90 mV