Asked by Federico Maeso on Jun 05, 2024
Verified
The trophoblast secretes ____, which signals the corpus luteum that pregnancy has begun.
A) estrogen
B) a gray crescent
C) progesterone
D) hCG
E) an enzyme
Trophoblast
The outer layer of cells surrounding a blastocyst in early development, which contributes to the placenta and provides nutrients to the embryo.
HCG
Human chorionic gonadotropin (HCG) is a hormone produced by the placenta after implantation.
- Gain an understanding of the elementary concepts behind the stages and processes of embryonic development.
Verified Answer
ZK
Zybrea KnightJun 08, 2024
Final Answer :
D
Explanation :
The trophoblast secretes human chorionic gonadotropin (hCG), which signals the corpus luteum that pregnancy has begun, maintaining its function and thereby sustaining the production of progesterone and estrogen necessary for pregnancy maintenance.
Learning Objectives
- Gain an understanding of the elementary concepts behind the stages and processes of embryonic development.
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