IB Biology HL D3.1.17 Hl Pregnancy Testing Questions

Trace embryo-produced HCG, its progesterone-support role and antibody detection in urine pregnancy tests for IB Biology HL D3.1.17.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain that the early embryo or blastocyst secretes HCG after implantation.
  • Link HCG to maintenance of the corpus luteum and continued progesterone support of the endometrium.
  • Explain that pregnancy tests use monoclonal antibodies to detect HCG.

IB Biology HL D3.1.17 Hl Pregnancy Testing Questions question 1

[Maximum number: 1]

What is a function of human chorionic gonadotropin (HCG)?

A

To stimulate the corpus luteum to produce progesterone during early pregnancy

B

To stimulate contraction of uterine muscles at the onset of birth

C

To inhibit the production of progesterone and prevent menstruation during pregnancy

D

To prevent polyspermy during fertilization in the fallopian tubes

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