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IB Biology HL C2.1.14 Hl Regulation By Feedback Questions

Practise IB Biology HL 2.1.14 by applying regulation by feedback concepts to exam questions.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify negative feedback as a downstream signal producing an opposite response that inhibits an upstream pathway.
  • Explain how negative feedback returns a regulated variable toward its prior level, using a hormone-control example.

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Study C2.1.14 (HL)—Regulation by feedback conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL C2.1.14 Hl Regulation By Feedback Questions question 1

[Maximum number: 1]

What is an example of negative feedback in the menstrual cycle?

A

High levels of estrogen inhibit FSH secretion.

B

High levels of LH stop progesterone secretion.

C

High levels of FSH delay ovulation.

D

High levels of progesterone make follicles less receptive to FSH.

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