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Question (11)

QN0029863

Which change occurs in the chest cavity during inhalation?

(A) Volume decreases and pressure increases
(B) Volume increases and pressure decreases
(C) Volume and pressure both increase
(D) Volume and pressure both decrease permanently

Correct Answer: B

Explanation:

Lower pressure allows air to enter the lungs.

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Question (12)

QN0029864

Which condition is most likely if the small intestine is unable to absorb nutrients properly?

(A) Faster heartbeat only
(B) Reduced energy and weakness
(C) Increased hearing ability
(D) Better digestion of fats

Correct Answer: B

Explanation:

Nutrients are needed for energy release and body functions.

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Question (13)

QN0029865

Which process occurs after nutrients are absorbed into the blood?

(A) Egestion
(B) Circulation to body cells
(C) Formation of saliva
(D) Removal of oxygen from lungs

Correct Answer: B

Explanation:

Blood transports nutrients to all body parts.

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Question (14)

QN0029866

Why does breathing through the nose help maintain good respiratory health?

(A) The nose produces oxygen
(B) Nose hair and mucus trap impurities
(C) The nose absorbs nutrients
(D) The nose controls heartbeat

Correct Answer: B

Explanation:

Dust and microbes are filtered before air enters lungs.

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Question (15)

QN0029867

Which statement best explains the relationship between digestion and respiration?

(A) Respiration occurs before digestion
(B) Digestion provides glucose used in respiration
(C) Respiration stores food in the stomach
(D) Digestion removes carbon dioxide from blood

Correct Answer: B

Explanation:

Glucose released during digestion is used to release energy.

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Question (16)

QN0029868

A bird swallows small pebbles along with food. These pebbles mainly help in

(A) breathing
(B) absorption of nutrients
(C) grinding food in the gizzard
(D) producing digestive juices

Correct Answer: C

Explanation:

Birds lack teeth, so grinding occurs in the gizzard.

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Question (17)

QN0029869

Which gas is transported from body cells to the lungs by blood?

(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Hydrogen

Correct Answer: C

Explanation:

Carbon dioxide is produced during respiration.

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Question (18)

QN0029870

Which situation best demonstrates adaptation in respiration?

(A) Earthworms respire through moist skin
(B) Humans digest food in the stomach
(C) Teeth cut and grind food
(D) Saliva moistens food

Correct Answer: A

Explanation:

Different animals have respiratory adaptations suited to their habitat.

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Question (19)

QN0029871

A person regularly eats fibre-rich foods. Which digestive problem is least likely to occur?

(A) Constipation
(B) Absorption of nutrients
(C) Digestion of proteins
(D) Saliva secretion

Correct Answer: A

Explanation:

Fibre helps smooth movement of stool through the intestine.

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Question (20)

QN0029872

Which sequence correctly represents the flow of oxygen in the human body?

(A) Mouth → stomach → blood → cells
(B) Nostrils → lungs → blood → body cells
(C) Nose → liver → heart → cells
(D) Windpipe → stomach → intestine → cells

Correct Answer: B

Explanation:

Oxygen enters through nostrils, reaches lungs, then blood carries it to cells.

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Question (11)

Which change occurs in the chest cavity during inhalation?

Explanation:

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Question (12)

Which condition is most likely if the small intestine is unable to absorb nutrients properly?

Explanation:

Link:

Question (13)

Which process occurs after nutrients are absorbed into the blood?

Explanation:

Link:

Question (14)

Why does breathing through the nose help maintain good respiratory health?

Explanation:

Link:

Question (15)

Which statement best explains the relationship between digestion and respiration?

Explanation:

Link:

Question (16)

A bird swallows small pebbles along with food. These pebbles mainly help in

Explanation:

Link:

Question (17)

Which gas is transported from body cells to the lungs by blood?

Explanation:

Link:

Question (18)

Which situation best demonstrates adaptation in respiration?

Explanation:

Link:

Question (19)

A person regularly eats fibre-rich foods. Which digestive problem is least likely to occur?

Explanation:

Link:

Question (20)

Which sequence correctly represents the flow of oxygen in the human body?

Explanation:

Link:

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