Final Exam in Health Promotion Flashcards
(150 cards)
At what age does the initiation of menstruation (menarche) start?
At ages 12 and 15
Menstrual cycles usually continue until age
45 to 55
What is the most frequent reasons why women visit the clinician?
Changes in menstruation
The normal menstrual cycle is how many days?
21 to 35 days with menstrual flow lasting 3 to 5 days, although a flow as few as 2 days or as many as 7 days is still considered normal
You want to reassure your patient that menstrual cycle that occur during first 1 to 1.5 years after menarche are frequently irregular , why?
due to immaturity of the hypothalamic-pituitary-ovarian axis
Fill the blank. Hypothalamus releases (what?) hormone that stimulates pituitary gland to produce
(which?) hormones?
Hypothalamus releases gonadotropin-releasing hormone (GnRH) and this hormone stimulates the pituitary gland to produce follicle stimulating hormone (FSH) and luteinizing hormone (LH).
What are the two hormones secreted by ovaries?
Estrogen and progesterone at the command of FSH and LH
Which hormone targets the ovaries and results in production of estrogen and progesterone?
FSH
Which hormone targets developing follicle within ovary and responsible for ovulation, corpus luteum formation, and hormone production in the ovaries
LH
Which hormone is responsible for preparing the mammary gland for lactation?
Prolactin (PRL)
What are the three phases of ovarian cycle?
follicular phase
ovulation
luteal phase
What are the 3 phases in endometrial cycle?
proliferative phase
secretory phase
menstruation
What is the negative feedback effect in hormonal feedback system?
GnRH pulses stimulate the release of FSH and LH, as a result ovarian follicles develop and produce estrogen.
As the amount of estrogen in the circulation increases and reaches pituitary gland, it affects the amount of FSH and LH secreted—– this is called negative feedback
What is the positive feedback?
When the estrogen level becomes high enough, the negative feedback of pituitary is reversed and estrogen causes midcycle positive feedback effect on the pituitary which results in a surge of LH and FSH and causes ovulation
Which hormone influences the ruptured follicle to become corpus luteum?
LH-luteinizing hormone
Corpus luteum secretes which hormone?
Progesterone
Does progesterone reduce or increase the frequency of the hypothalamic GnRH pulses?
The presence of progesterone reduces the frequency of the hypothalamic GnRH pulses but the amount of LH released from pituitary is proportionally increased to sustain the corpus luteum and the production of progesterone.
What happens to corpus luteum and progesterone in the absence of pregnancy?
In the absence of pregnancy the corpus luteum degenerates, progesterone levels decline and menstruation occurs
What are the three phases that comprise ovarian cycle?
follicular phase
ovulatory phase
luteal phase
What is the primary role of FSH in follicular phase?
The primary role of FSH is to induce the development of increased receptors on the granulosa cells and thereby stimulate estrogen production
What is the preliminary role of LH in follicular phase?
To stimulate the cell’s production of androgen and that will be converted to estrogen by granulosa layers.
What is the name of the dominant follicle?
Graafian follicle
When does proliferative phase begin?
It begins about the fourth or fifth day of the cycle and usually last approximately 10 days ending with the release of the ovum
What are the three phases of endometrial cycle?
Proliferative, secretory and menstrual