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IB Biology SL 3.1.13 Hypothalamus and pituitary control Question Bank

Practise IB Biology SL 3.1.13 by linking hypothalamus and pituitary hormones to appetite, menstrual signals and endocrine homeostasis.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how hypothalamus and pituitary hormones regulate appetite, menstrual signals and endocrine homeostasis.
  • Use leptin, FSH and feedback evidence to identify hormone sources, targets and effects on physiological regulation.

C3.1.13—Hypothalamus and pituitary control question 1

[Maximum number: 3]

The graph below shows the levels of hormones during the menstrual cycle.

Figure for Question C3.1.13—Hypothalamus and pituitary control question 1 — IB Biology SL

Question (a)

(a)

Outline the roles of FSH in the menstrual cycle.

[ 2 ]

Question (b)

(b)

FSH is secreted by the pituitary gland. During pregnancy, FSH secretion is inhibited. Suggest how FSH secretion could be inhibited during pregnancy.

[ 1 ]
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