CSIR NET Life Science Unit 7 MCQs with Answers

Here below are 15 core System Physiology – Animal topics across five parts. Choose Easy, Medium or Difficult for each topic to practise 15 questions per level. Answers show the correct option and explanation immediately.

Part 1: Topics 1–3

1. Neuronal Resting Membrane Potential

15 practice questions per difficulty level · Select a level

2. Synaptic Transmission and Neurotransmitters

15 practice questions per difficulty level · Select a level

3. Muscle Contraction

15 practice questions per difficulty level · Select a level

Part 2: Topics 4–6

4. Blood and Hemostasis

15 practice questions per difficulty level · Select a level

5. Cardiac Physiology

15 practice questions per difficulty level · Select a level

6. Blood Pressure and Circulation

15 practice questions per difficulty level · Select a level

Part 3: Topics 7–9

7. Respiratory Mechanics

15 practice questions per difficulty level · Select a level

8. Gas Exchange and Transport

15 practice questions per difficulty level · Select a level

9. Renal Filtration and Tubular Transport

15 practice questions per difficulty level · Select a level

Part 4: Topics 10–12

10. Osmoregulation and Acid-Base Balance

15 practice questions per difficulty level · Select a level

11. Digestive Physiology

15 practice questions per difficulty level · Select a level

12. Endocrine Signaling and Hormone Action

15 practice questions per difficulty level · Select a level

Part 5: Topics 13–15

13. Reproductive Physiology

15 practice questions per difficulty level · Select a level

14. Immune System Physiology

15 practice questions per difficulty level · Select a level

15. Homeostasis and Physiological Integration

15 practice questions per difficulty level · Select a level

Frequently Asked Questions

What causes the rising phase of a neuronal action potential?

Opening of voltage-gated sodium channels causes rapid sodium influx and membrane depolarization.

How does hemoglobin carry oxygen cooperatively?

Binding of oxygen to one subunit changes hemoglobin conformation and increases oxygen affinity at other sites.

What is the function of the nephron loop?

It contributes to the medullary osmotic gradient needed to concentrate urine.

How does negative feedback regulate thyroid hormones?

Circulating thyroid hormones suppress TRH and TSH release through hypothalamic–pituitary feedback.

What initiates blood clot formation after vessel injury?

Vascular injury exposes procoagulant surfaces and activates platelet responses and the coagulation cascade.

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