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 effect of sympathetic stimulation on heart rate is
A) Increase
B) Irregularity
C) Decrease
D) No change
Q: The neurotransmitter used at neuromuscular junctions is
A) GABA
B) Acetylcholine
C) Serotonin
D) Dopamine
Q: The hormone secreted in response to high blood glucose is
A) Insulin
B) Glucagon
C) Cortisol
D) Aldosterone
Q: The main organ responsible for detoxifying blood is the
A) Liver
B) Lung
C) Kidney
D) Spleen
Q: The largest volume of blood is found in the
A) Heart
B) Arteries
C) Veins
D) Capillaries
Q: The role of platelets is to aid in
A) Immune defense
B) Blood clotting
C) Hormone production
D) Oxygen transport
Q: The movement of food through the digestive tract is aided by
A) Peristalsis
B) Filtration
C) Retraction
D) Diffusion
Q: The fluid secreted by serous membranes to reduce friction is called
A) Cerebrospinal fluid
B) Serous fluid
C) Synovial fluid
D) Mucus
Q: The gas that binds to hemoglobin more tightly than oxygen is
A) Hydrogen
B) Carbon monoxide
C) Nitrogen
D) Sulfur dioxide
Q: The portion of the brain that regulates hunger and thirst is the
A) Medulla
B) Pons
C) Cerebellum
D) Hypothalamus