Chapter 24: urinary system and reproductive physiology Flashcards

(44 cards)

1
Q

true or false: the reproductive system performs homeostatic functions

A

false

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2
Q

the urinary system plays a role in homeostasis by regulating ECF variables. How does it do this?

A

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

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3
Q

what hormones do the kidneys secrete?

A

erythropoietin and renin

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4
Q

what do erythropoietin and renin do?

A

that regulates red blood cell production and blood pressure

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5
Q

what hormones effect kidney function?

A

aldosterone, antidiuretic hormone, and atrial natriuretic hormone

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6
Q

what is the effects of aldosterone, antidiuretic hormone and atrial natriuretic hormone have on the kidneys?

A

changes the rates at which water, sodium ions, and potassium ions are excreted

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7
Q

a change in an ECF variable is a physiological stress. you will stess your body by changing one or more of the following–

A

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
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8
Q

how does your body respond to the stress of changes to the ECF?

A

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
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9
Q

does the reproductive system have a homeostatic role?

A

no

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10
Q

what is the function of the reproductive system?

A

to produce new individuals

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11
Q

how is reproduction controlled?

A

reproduction is controlled hormonally

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12
Q

where is GnRH from?

A

the hypothalmus

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13
Q

where are LH and FSH from?

A

the anterior pituitary

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14
Q

what produces sex hormones?

A

the gonads produce sex hormones which effect organs of the reproductive system

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15
Q

what hormone is important in pregnancy?

A

human chorionic gonadotropin (hCG)

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16
Q

implantation

A

burrowing of the embryo into the uterine wall

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17
Q

approximately ____ week after fertilization, a developing embryo begins implantation.

A

one

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18
Q

after implantation, the _____ is developed rapidly.

19
Q

where is the placenta derived from?

A

both fetal and maternal tissues

20
Q

the placenta is the site where :

A

the exchange of substances between maternal and fetal blood occurs

21
Q

in response to hCG does the corpus luteum degenerate or continue to grow?

A

continues to grow and secretes increasing quantities of estrogens and progesterone

22
Q

estrogen and progesterone prevent what?

A

prevent the uterine wall from being shed (unlike the normal uterine cycle

23
Q

peak secretion of hCG occurs about _____ days after the end of the last menstrual period

24
Q

by the ____ week of pregnancy hCG output declines to a low rate of secretion that is maintained for the duration of gestation.

25
when does the fall in hCG occur?
at a time when hormones produced by the corpus luteum are no longer needed because the placenta has begun to secrete substantial quantities of estrogens and progesterone
26
hCG is secreted into what
secreted into the blood
27
why does hCG in blood or urine indicate pregnancy?
- hCG is secreted in blood - blood flows through the kidneys hCG is filtered - not all of the hCG filtered is reabsorbed - the nonabsorbed hCG is present in urine and blood
28
pregnancy tests are _____.
immunological
29
pregnancy tests rely on ______.
antigen-antibody reaction to directly detect the presence of hCG in blood or urine
30
if hCG is present in urine, this is a _____ test.
positive
31
what result indicated that hCG was present in a urine sample?
the pregnant tube was cloudier or opaque
32
what is the antigen?
chorionic gonadotropin
33
what is the antibody
anti-hCG
34
what is the result of this antigen antibody reaction?
visible clumping or color change
35
clinical tests are very sensitive highly accurate and are usually run on ________ rather than urine.
blood serum
36
human chorionic gonadotropin is usualy detectable in a woman's blood ____ week after fertilization and detectable in urine sometime during the ____ week of pregnancy.
detectable in blood 1 week after fertilization | detectable in urine 2 weeks after fertilization
37
true or false: the reproductive system performs homeostatic functions
false
38
what hormones directly stimulate development of the uterine wall and prevent it from being shed
estrogen and progesterone?
39
true or false: urines specific gravity cannot be less than 1
true
40
normal value of urine rate of formation is ...
1 ml/min
41
normal value of urine pH is...
6
42
normal value of urine specific gravity is ...
1.020
43
what is specific gravity?
``` its density (mass per unit volume) relative to dH2O in this case it indicates urine concentration ```
44
a concentrated urine has a higher or lower specific gravity than a dilute urine?
higher specific gravity