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REproduction

The midcycle surge of LH that triggers ovulation also induces the formation of a (1) ____ _______ in the ovary. This yellowish, glandular structure forms by cell differentiation among (2) _________________ cells left behind in the follicle. Secretions from the (1) influence the rest of the cycle.
The corpus luteum secretes (3) _____________ and some estrogen. Progesterone prepares the reproductive tract for the arrival of a(n) (4)______________. This hormone makes cervical (5) ___________ turn thick and sticky; it may keep normal bacterial inhabitants of the (6) ____ out of the uterus. Progesterone also will maintain the (7) ____ during pregnancy.
A corpus luteum persists for about (8) _______ days. All the while, the (9) _____ is calling for minimal FSH secretion, which stops other (10) ______ form developing. If a(n) (11) _________ does not burrow into the endometrium, the corpus luteum will self-destruct during the last days of the cycle. It will secrete certain (12) _____ that apparently can disrupt is own functioning.
Following this, estrogen and (13) ________ levels in blood decline rapidly, and so the (14) _________ starts to break down. Blood as well as the sloughed endometrial tissues make up a (15) _________ flow, which continues for three to six days. Thus, the cycle begins anew. By (16) __________, the supply of oocytes is dwindling, hormone secretions slow down, and in time menstrual cycles - and fertility - will be over.
A. twelve
B. corpus luteum
C. mucus
D. menopause
E. progesterone
F. endometrium
G. blastocyst
H. follicles
I. vagina
J. menstrual
K. hypothalamus
L. prostaglandins
M. granulosa

Solution Preview

The paragraph here is looking at the female menstrual cycle. It starts from the midcycle surge which will cause - ovulation and
- CORPUS LUTEUM formation ( remnant of the GRANULOSA CELLS).
The secretions of the Corpus luteum include - estrogen and
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