Our collection of physiology MCQs is meticulously designed to reinforce the conceptual understanding of various topics in biology. Covering a broad spectrum, our Human Physiology MCQs with answers delve into multiple concepts, including human digestion, the nervous system, human reproduction, body fluids and circulation, breathing and gas exchange, the renal system, respiratory system, GIT and liver, endocrinology, locomotion and movement in human sense organs, reflex actions, spinal nerves, physiology of urine formation, insulin physiology, and more. These carefully selected topics are sourced from reputable and authoritative physiology reference books. Our physiology MCQs with answers serve as invaluable resources for individuals preparing for interviews, entrance exams, competitive assessments, and certifications, catering to experienced professionals, newcomers, and students alike. Additionally, explore our MCQs on Pharmacology for further study.

1. Ventilation perfusion ratio is maximum in_______________?

A. Base of lung
B. Apex of lung
C. Posterior lobe of lung
D. Middle lobe of lung

2. Vital capacity is a measure of________________?

A. Tidal volume
B. Inspiratory reserve volume plus expiratory volume
C. Tidal volume plus inspiratory reserve volume plus expiratory reserve volume
D. Expiratory reserve volume plus reserve volume

3. Oxygen affinity decreases in_________________?

A. Hypoxia
B. Hypothermia
C. HbF
D. Increased pH

4. Arterial O2 content is reduced in one of following ______________?

A. Stagnant hypoxia
B. Anemic hypoxia
C. Histotoxic hypoxia
D. Hypoxic or arterial hypoxia

5. Oxygen affinity is increased by all except_________________?

A. Alkalosis
B. Hypoxia
C. Increased HbF
D. Hypothermia

6. Non- respiratory function of the lung is_________________?

A. Dopamine metabolism
B. Adrenaline metabolism
C. Serotonin metabolism
D. PGE2 production

7. Smoking causes_____________?

A. Ciliary motility
B. Cellular hyperplasia
C. Mucous secretion
D. All of the above

8. Limitation of inspiration by vagal lung inflation signals is called the______________?

A. Autonomic reflex
B. Bainbridge reflex
C. Herring – Breur reflex
D. Dynamic stretch reflex

9. Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?

A. The relative proportion of reduced and oxygenated hemoglobin
B. The absolute amount of reduced hemoglobin
C. Thickness of the skin
D. Fragility of capillaries

10. During the initial part of inspiration, which of the following does not occur ?

A. Intrapulmonary pressure falls
B. Intra thoracic pressure rises
C. Intra-abdominal pressure rises
D. The partial pressure of O2 in dead space rises