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: The main function of surfactant in alveoli is to reduce
A) Surface tension
B) Air volume
C) Lung size
D) Oxygen pressure
Q: The longest phase of the cardiac cycle is
A) Diastole
B) Systole
C) Refractory period
D) Isovolumetric contraction
Q: The descending loop of Henle is permeable to
A) Glucose
B) Water
C) Urea
D) Sodium
Q: The site of fertilization in the female reproductive system is the
A) Ovary
B) Uterus
C) Cervix
D) Fallopian tube
Q: Hemoglobin binds oxygen more readily at
A) High pH
B) High CO₂
C) Low pH
D) High temperature
Q: The volume of air exchanged during normal breathing is known as
A) Inspiratory reserve
B) Vital capacity
C) Tidal volume
D) Residual volume
Q: Vitamin D enhances calcium absorption primarily in the
A) Small intestine
B) Stomach
C) Esophagus
D) Colon
Q: The phase of gastric secretion activated by food in the stomach is the
A) Cephalic phase
B) Resting phase
C) Gastric phase
D) Intestinal phase
Q: A decrease in oxygen availability triggers increased production of
A) Melatonin
B) Calcitonin
C) Insulin
D) Erythropoietin
Q: The hormone that stimulates milk ejection during breastfeeding is
A) Oxytocin
B) Prolactin
C) Estrogen
D) Testosterone