MCQ Collection
MDCAT Biology MCQs
Practice MDCAT Biology questions with answers and explanations.
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Correct Answer: B. Defend against infection and abnormal cells
Explanation:
White blood cells participate in innate and adaptive immunity.
Different types perform specialized defense roles.
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Correct Answer: C. Alveoli
Explanation:
Alveoli have thin walls and rich capillary networks.
Their large surface area supports rapid diffusion.
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Correct Answer: D. Alveoli
Explanation:
Alveoli have thin walls and rich capillary networks.
Their large surface area supports rapid diffusion.
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Correct Answer: A. Movement of air into and out of the lungs
Explanation:
Ventilation depends on pressure changes created by respiratory muscles.
It is distinct from gas diffusion.
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Correct Answer: B. Movement of air into and out of the lungs
Explanation:
Ventilation depends on pressure changes created by respiratory muscles.
It is distinct from gas diffusion.
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Correct Answer: C. Movement of air into and out of the lungs
Explanation:
Ventilation depends on pressure changes created by respiratory muscles.
It is distinct from gas diffusion.
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Correct Answer: D. It contracts and flattens
Explanation:
Contraction enlarges thoracic volume.
Lower pressure draws air into the lungs.
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Correct Answer: A. Absorb water and form feces
Explanation:
The large intestine reclaims water and electrolytes.
It also houses many beneficial microbes.
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Correct Answer: A. It contracts and flattens
Explanation:
Contraction enlarges thoracic volume.
Lower pressure draws air into the lungs.
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Correct Answer: B. Absorb water and form feces
Explanation:
The large intestine reclaims water and electrolytes.
It also houses many beneficial microbes.
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Correct Answer: B. It contracts and flattens
Explanation:
Contraction enlarges thoracic volume.
Lower pressure draws air into the lungs.
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Correct Answer: C. Absorb water and form feces
Explanation:
The large intestine reclaims water and electrolytes.
It also houses many beneficial microbes.
