MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: D. Actin and myosin slide past each other to shorten a sarcomere
Explanation:
Myosin heads pull actin toward the sarcomere center.
ATP and calcium regulate cross-bridge cycling.
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Correct Answer: A. Raise blood glucose
Explanation:
Glucagon stimulates hepatic glucose production.
It is secreted during low blood glucose.
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Correct Answer: A. Actin and myosin slide past each other to shorten a sarcomere
Explanation:
Myosin heads pull actin toward the sarcomere center.
ATP and calcium regulate cross-bridge cycling.
Choose an option to check your answer.
Correct Answer: B. Raise blood glucose
Explanation:
Glucagon stimulates hepatic glucose production.
It is secreted during low blood glucose.
Choose an option to check your answer.
Correct Answer: B. Sperm cell
Explanation:
Sperm are haploid reproductive cells.
They are produced in the testes.
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Correct Answer: C. Increase metabolic activity and support growth
Explanation:
Thyroid hormones influence basal metabolic rate.
They are also important for development.
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Correct Answer: C. Sperm cell
Explanation:
Sperm are haploid reproductive cells.
They are produced in the testes.
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Correct Answer: D. Increase metabolic activity and support growth
Explanation:
Thyroid hormones influence basal metabolic rate.
They are also important for development.
Choose an option to check your answer.
Correct Answer: D. Sperm cell
Explanation:
Sperm are haploid reproductive cells.
They are produced in the testes.
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Correct Answer: A. A rapid automatic response to a stimulus
Explanation:
Reflex pathways often involve the spinal cord.
They protect the body and maintain posture.
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Correct Answer: A. Increase metabolic activity and support growth
Explanation:
Thyroid hormones influence basal metabolic rate.
They are also important for development.
Choose an option to check your answer.
Correct Answer: A. Ovum
Explanation:
The ovum is a haploid reproductive cell.
It is produced in the ovaries.
