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MCAT Biological and Biochemical Foundations of Living Systems Flashcards: 3b Reproductive System Hormonal Control

Study 3b Reproductive System Hormonal Control in MCAT Biological and Biochemical Foundations of Living Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What enzyme converts testosterone to dihydrotestosterone (DHT), and where is DHT most important?

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ANSWER

5α-reductase; external genitalia and prostate development. 5α-reductase enhances androgen potency; DHT is key for masculinization of external structures and prostate growth.

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MCAT Biological and Biochemical Foundations of Living Systems: Foundational Concept 3: Organ Systems and Homeostasis

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What this deck covers

This deck focuses on 3b Reproductive System Hormonal Control, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Biological and Biochemical Foundations of Living Systems.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
In a study of pulsatile gonadotropin regulation, healthy adult volunteers received a continuous (nonpulsatile) intravenous infusion of gonadotropin-releasing hormone (GnRH) for 72 hours. Serum luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were measured before infusion and at 72 hours. Participants reported no change in sleep or caloric intake during the protocol. The investigators propose that the observed gonadotropin pattern reflects a specific principle of hormonal regulation in the hypothalamic–pituitary–gonadal axis. Which outcome is most consistent with hormonal feedback and signaling dynamics under these conditions?
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