Hormones 2 Flashcards
Function of estrogen
initiates puberty, including
- maturation of sexual organs
- subcutaneous fat stores
- closure of epiphyseal plates
- widening of pelvic girdle
Progesterone function
- less important in sexual maturation
- more involved with facilitating and maintaining pregnancy
FSH released by anterior pituitary in this phase
Follicular
FSH function
Matures into ovum
FSH and LH in the menstrual cycle
- LH released by ant pituitary at menstrual midpoint
- smaller burst of FSH for ovulation
_____ releases the ovum, then becomes infiltrated by lipids (_________)
- follicle
- corpus luteum
Small amounts of these are produced by the ovaries
Male hormones (androgens)
Primary functions of the menstrual cycle in the nonpregnant postpubescent female
- stimulate the ovaries to produce an ovum that is available for fertilization
- prep the endometrium of the uterus for implantation should fertilization occur
What happens during ovulation?
- Just prior to cycle’s midpoint, ant pituitary secretes sudden burst of LH
- smaller burst of FSH also occurs
- mature follicle ruptures, releasing the ovum from the ovary
- ovum travels toward uterus via fallopian tubes
What happens to the follicle after releasing the ovum?
- becomes infiltrated with lipids
- referred to as the corpus luteum
What controls the second half of the menstrual cycle?
Corpus luteum
What happens to the corpus luteum?
- continues to grow for about 1 week post ovulation, secreting estrogen and progesterone
- thickens uterine lining
- progesterone stimulates mucus for potential implantation of a fertilized egg
What happens to the corpus luteum if there is no fertilization?
- corpus luteum regresses (no longer supported by burst of hormones)
- menstruation occurs
What happens if the egg is fertilized?
- Human chorionic gonadotropin (HCG) is released
- takes over the role of LH
- prevents destruction of corpus luteum
Parturition =
Childbirth
