Biology Questions and Answers
- What is the menstrual
cycle?
The menstrual cycle is the periodic
succession ohormones anf interactionsd the organs o betweenf the female (^)
reproductive system that, after the
beginning of puberty, regulates therelease of the female gametes and
prepares the uterus for fecundation and
pregnancy.
- What are the endocrine
glands involved in the
menstrual cycle? What are the
hormones in action?
The endocrine glands that secrete
hormones invcycle are the hypophysis (pituitary)olved in the menstrual and (^)
the ovaries.
The hormones from adenohypophysisare FSH (follicle-stimulating hormone) (^)
and LH hormones from th(luteinizing e ovarihormone) and thees are estrogen (^)
and progesterone.
- What event marks the
beginning of the menstrual
cycle? What is the blood
concentration of FSH, LH,
estrogen and progesterone in
this phase of the cycle?
By convbegins at the ention day that menses begins.the menstrual cycle (^)
(Menses is the endometrial hemorrhage
excreted through the vaginal these days the hormones FSH, canal.)LH, At
estrogens and progesterone are in low
concentration.
- After menses what is the
hormone that influences the
maturation of the ovarian
follicles?
The maturation of the ovarian follicles
after menses is stimulated bof FSH (follicle-stimulating hormone).y the action - What is the hormone
secreted by the growing
ovarian follicles? What is the
action of that hormone upon
the uterus?
The follicles that are growing after
menses secrhormones actete estro upon the uterusgen. These
stimulating the thickening of the
endometrium the uterus). (the internal mucosa of - What is the relationship
between the estrogen level
and the LH level in the
menstrual cycle? What is the
function of LH in the
menstrual cycle and when
does its blood concentration
reach a peak?
The increase of estrogen with thin the blood concentratione growing of the
ovarian follicle causes tsecrete LH. In this phase LH he hypophysis toacts
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