Asked by parichart nurnchay on May 06, 2024
Verified
Which of these descriptions could be associated with the secretory phase of the uterine cycle?
A) low FSH → high estrogen → developing follicle → increase in uterine lining
B) high LH → high estrogen → developing follicle → uterine lining breakdown
C) decrease in LH → increase in progesterone → corpus luteum present → secretory uterine lining
D) decrease in LH → decrease in progesterone → corpus luteum present → secretory uterine lining
E) increase in LH → increase in progesterone → corpus luteum present → endometrium released
Secretory Phase
The phase of the menstrual cycle following ovulation, during which the lining of the uterus thickens and prepares for possible implantation of an embryo.
Corpus Luteum
A temporary endocrine structure in female ovaries that is involved in the production of progesterone during the menstrual cycle and early stages of pregnancy.
Progesterone
Progesterone is a steroid hormone released by the corpus luteum that regulates the menstrual cycle and is crucial for maintaining pregnancy.
- Recognize the phases and features of the menstrual and ovarian cycles.
Verified Answer
ZK
Zybrea KnightMay 06, 2024
Final Answer :
C
Explanation :
During the secretory phase of the uterine cycle, the corpus luteum (formed from the collapsed follicle after ovulation) is present and secretes progesterone, causing the uterine lining to become more glandular and vascular, preparing for implantation of a fertilized egg. LH decreases as progesterone increases. This phase occurs after ovulation and before menstruation.
Learning Objectives
- Recognize the phases and features of the menstrual and ovarian cycles.