Physiology MCQs
Physiology MCQs help medical and dental students develop a thorough understanding of the body's functional mechanisms. These multiple-choice questions focus on various systems such as cardiovascular, respiratory, renal, digestive, endocrine, and neurophysiology. Practicing these MCQs enhances knowledge retention and exam performance in tests like MDCAT, NTS, USMLE, and FCPS. Whether you're preparing for academic exams or professional licensure, these quizzes provide a solid framework for mastering the dynamic processes of the human body.
Q: Atrial natriuretic peptide causes
A) Sodium reabsorption
B) Sodium excretion
C) Vasoconstriction
D) Increased ADH secretion
Q: Primary muscle used during normal quiet breathing
A) Internal intercostals
B) Sternocleidomastoid
C) External intercostals
D) Diaphragm
Q: The region of the brain that controls body temperature
A) Pons
B) Medulla
C) Cerebellum
D) Hypothalamus
Q: A decrease in blood pH will cause hemoglobin to
A) Increase oxygen binding
B) Form carboxyhemoglobin
C) Release more oxygen
D) Denature
Q: The fastest phase of depolarization in cardiac muscle
A) Phase 4
B) Phase 2
C) Phase 0
D) Phase 1
Q: The ion mainly responsible for repolarization in neurons
A) Sodium
B) Potassium
C) Calcium
D) Chloride
Q: Gastric acid secretion is stimulated by
A) Glucagon
B) Secretin
C) Gastrin
D) Cholecystokinin
Q: The function of bile salts
A) Enzyme activation
B) Emulsification of fats
C) Protein denaturation
D) Carbohydrate digestion
Q: The phase of the cardiac cycle when ventricles contract
A) Atrial systole
B) Ventricular systole
C) Diastasis
D) Isovolumetric relaxation
Q: The oxygen-hemoglobin dissociation curve shifts right due to
A) Increased 2,3-BPG
B) Decreased temperature
C) Alkalosis
D) Low CO₂