Human Physiology Nptel Week 3 Assignment Answers
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Human Physiology Nptel Week 3 Assignment Answers (July-Dec 2025)
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Question 1. Which of the following cells is primarily responsible for producing antibodies?
a) T lymphocytes
b) B lymphocytes
c) Macrophages
d) Natural killer cells
Question 2. What valve prevents backflow of blood into the left atrium when the left ventricle contracts?
a) Aortic valve
b) Pulmonary valve
c) Tricuspid valve
d) Bicuspid (Mitral) valve
Question 3. Antibodies act against?
a) Bacteria
b) Virus
c) Fungi
d) All of these
Question 4. Which layer of the heart is responsible for its pumping action?
a) Endocardium
b) Epicardium
c) Myocardium
d) Pericardium
Question 5. The fluid transported by the lymphatic system is called:
a) Plasma
b) Serum
c) Lymph
d) Interstitial fluid
Question 6. Which chamber of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Left atrium
c) Right ventricle
d) Left ventricle
Question 7. What is the function of the sinoatrial (SA) node in the heart?
a) Filters deoxygenated blood
b) Acts as a pacemaker by initiating electrical impulses
c) Contracts the ventricles
d) Connects the atria and ventricles
Question 8. Which heart disease is caused by plaque buildup in coronary arteries?
a) Cardiomyopathy
b) Arrhythmia
c) Coronary artery disease (CAD)
d) Congenital heart defect
Question 9. Which blood pressure value represents pressure when the heart relaxes?
a) Systolic
b) Diastolic
c) Both
d) None
Question 10. Which part of the ECG corresponds to electrical activity that triggers contraction of the ventricles?
a) P wave
b) T wave
c) QRS complex
d) PR interval
These are Human Physiology Nptel Week 3 Assignment Answers