MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: A. Movement of substances from blood into the renal tubule
Explanation:
Secretion helps eliminate drugs, acids, and ions.
It also contributes to acid-base control.
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Correct Answer: B. Movement of substances from blood into the renal tubule
Explanation:
Secretion helps eliminate drugs, acids, and ions.
It also contributes to acid-base control.
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Correct Answer: C. Increase water reabsorption by the kidneys
Explanation:
ADH increases collecting-duct water permeability.
It helps conserve water.
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Correct Answer: D. Increase water reabsorption by the kidneys
Explanation:
ADH increases collecting-duct water permeability.
It helps conserve water.
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Correct Answer: A. Increase water reabsorption by the kidneys
Explanation:
ADH increases collecting-duct water permeability.
It helps conserve water.
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Correct Answer: B. Rapid communication and coordination
Explanation:
The nervous system uses electrical and chemical signals.
It detects stimuli and coordinates responses.
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Correct Answer: A. Movement of useful substances from filtrate back into blood
Explanation:
Water, glucose, ions, and other substances are reabsorbed.
The process maintains body composition.
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Correct Answer: B. Movement of useful substances from filtrate back into blood
Explanation:
Water, glucose, ions, and other substances are reabsorbed.
The process maintains body composition.
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Correct Answer: C. Movement of useful substances from filtrate back into blood
Explanation:
Water, glucose, ions, and other substances are reabsorbed.
The process maintains body composition.
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Correct Answer: D. Movement of substances from blood into the renal tubule
Explanation:
Secretion helps eliminate drugs, acids, and ions.
It also contributes to acid-base control.
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Correct Answer: A. Left ventricle
Explanation:
The left ventricle ejects blood into the aorta.
Its thick wall generates systemic pressure.
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Correct Answer: A. Carry blood toward the heart
Explanation:
Veins operate at lower pressure and often contain valves.
They return blood to the heart.
