Chapter 24: urinary system and reproductive physiology Flashcards
(44 cards)
true or false: the reproductive system performs homeostatic functions
false
the urinary system plays a role in homeostasis by regulating ECF variables. How does it do this?
by controlling the amounts of water, organic molecules, electrolytes, and acids and bases that are excreted in urine
-it also removes waste products from the blood then eliminates them from the body
what hormones do the kidneys secrete?
erythropoietin and renin
what do erythropoietin and renin do?
that regulates red blood cell production and blood pressure
what hormones effect kidney function?
aldosterone, antidiuretic hormone, and atrial natriuretic hormone
what is the effects of aldosterone, antidiuretic hormone and atrial natriuretic hormone have on the kidneys?
changes the rates at which water, sodium ions, and potassium ions are excreted
a change in an ECF variable is a physiological stress. you will stess your body by changing one or more of the following–
ECF volume, ECF osmolarity, and ECF pH
- your body responds and returns the changed ECF variable to normal by changing the rate of urine formation, the concentration of water in urine, and/or urine pH
how does your body respond to the stress of changes to the ECF?
your body returns the changed ECF variables to normal by
- changing the rate of urine formation
- changing the concentration of water in urine
- changing urine pH
does the reproductive system have a homeostatic role?
no
what is the function of the reproductive system?
to produce new individuals
how is reproduction controlled?
reproduction is controlled hormonally
where is GnRH from?
the hypothalmus
where are LH and FSH from?
the anterior pituitary
what produces sex hormones?
the gonads produce sex hormones which effect organs of the reproductive system
what hormone is important in pregnancy?
human chorionic gonadotropin (hCG)
implantation
burrowing of the embryo into the uterine wall
approximately ____ week after fertilization, a developing embryo begins implantation.
one
after implantation, the _____ is developed rapidly.
placenta
where is the placenta derived from?
both fetal and maternal tissues
the placenta is the site where :
the exchange of substances between maternal and fetal blood occurs
in response to hCG does the corpus luteum degenerate or continue to grow?
continues to grow and secretes increasing quantities of estrogens and progesterone
estrogen and progesterone prevent what?
prevent the uterine wall from being shed (unlike the normal uterine cycle
peak secretion of hCG occurs about _____ days after the end of the last menstrual period
60 days
by the ____ week of pregnancy hCG output declines to a low rate of secretion that is maintained for the duration of gestation.
10th