Chapter Exam

Chapter-14 Human Physiology — Online MCQ Test

Q: Which organ produces bile that helps in fat digestion?

Answer: A. Liver — The liver produces bile, which helps in the emulsification of fats. Bile is stored in the gall bladder before release into the small intestine.

Q: The rhythmic contraction and relaxation of the heart is called ____.

Answer: B. Cardiac cycle — The cardiac cycle refers to the sequence of contraction and relaxation of the heart. It helps pump blood throughout the body.

Q: Which of the following is the correct sequence of food passage in the digestive system?

Answer: A. Mouth → Oesophagus → Stomach → Small intestine — Food enters the mouth first, then passes through the oesophagus to the stomach and finally the small intestine. This is the normal pathway of digestion.

SCIENCE · Samacheer Kalvi 9th · Tamil Nadu State Board

Practice Chapter-14 Human Physiology with a free chapter-wise online MCQ test for Tamil Nadu State Board Samacheer Kalvi 9th SCIENCE. This chapter covers: Description Describes the digestive circulatory respiratory and nervous systems in humans Keywords Digestion Respiration Circulation Nervous System Physiology. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-14 Human Physiology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board Samacheer Kalvi 9th SCIENCE — Chapter-14 Human Physiology, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which organ produces bile that helps in fat digestion?

A. Liver ✓
B. Stomach
C. Pancreas
D. Small intestine

Answer: A. Liver
The liver produces bile, which helps in the emulsification of fats. Bile is stored in the gall bladder before release into the small intestine.

The rhythmic contraction and relaxation of the heart is called ____.

A. Pulse
B. Cardiac cycle ✓
C. Respiration
D. Digestion

Answer: B. Cardiac cycle
The cardiac cycle refers to the sequence of contraction and relaxation of the heart. It helps pump blood throughout the body.

Which of the following is the correct sequence of food passage in the digestive system?

A. Mouth → Oesophagus → Stomach → Small intestine ✓
B. Mouth → Stomach → Oesophagus → Small intestine
C. Mouth → Small intestine → Stomach → Oesophagus
D. Mouth → Large intestine → Stomach → Oesophagus

Answer: A. Mouth → Oesophagus → Stomach → Small intestine
Food enters the mouth first, then passes through the oesophagus to the stomach and finally the small intestine. This is the normal pathway of digestion.

Which of the following correctly compares arteries and veins?

A. Arteries carry blood to the heart; veins carry blood away from the heart
B. Arteries always carry deoxygenated blood; veins always carry oxygenated blood
C. Arteries have thick, elastic walls; veins have thinner walls ✓
D. Arteries contain valves; veins do not contain valves

Answer: C. Arteries have thick, elastic walls; veins have thinner walls
Arteries have thick, elastic walls to withstand high pressure, while veins have thinner walls. Veins usually contain valves to prevent backflow.

Which of the following statements about the human heart is correct?

A. The right atrium receives oxygenated blood from the lungs
B. The left ventricle pumps blood to the entire body ✓
C. The left atrium receives blood from the vena cava
D. The right ventricle pumps blood to the body through the aorta

Answer: B. The left ventricle pumps blood to the entire body
The left ventricle has thick muscular walls and pumps oxygenated blood into the aorta for distribution to the body. The right ventricle pumps blood to the lungs.

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