Urinary System (Functions) Flashcards Preview

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Flashcards in Urinary System (Functions) Deck (18)
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1

kidney

main function - filter blood

2

blood pressure

regulates blood to nephrons
increas in BP increases amount of filtrate and vice versa

3

membrane condition

condition of bowmans capsule
membrane inflammed = less filtrate

4

glomerular filtrate

product of filtration
includes water, sugars, salts, toxins, urea, and acid

5

active re-absorption

accomplished by enzymes in the peritubular capollaries

6

passive re-absorption

diffusion
osmosis

7

ureters

transport urine from the pelvis to the bladder

8

methods of transportation

peostaltic contractions of the muscular walls of the ureters (paristalis)
hydrostatic pressure
gravity

9

bladder

function is to store urine prior to micturition

10

micturition

commonly known as urination
controlled by a combination of voluntary and involuntary activities

11

urethra

the terminal portion of the urinary system
passageway for discharging urine from the body
male urethra also serves as duct for various reproductive secretions

12

urine

composed of about 95% water
remaining 5% consists of solutes derived from cellular metabolism and outside such as drugs

13

remaining 5%

urea, creatinine, uric acid, urobilinogen

14

urea

composes 60-90% of all nitrogen - containing material in urine

15

creatinine

derived from the breakdown of creatine phosphate in muscle tissue

16

uric acid

product of catabolism of nucleic acids derived from food or cellular destruction

17

urobilinogen

bile pigment derived from the breakdown of hemoglobin

18

urine volume

affected by fluid intake, blood pressure, blood osmotic pressure, diet temperature, diruetics, mental state and health