urogenital system Flashcards
urinary system functions
eliminate waste
water and ion balance
structures of urinary system
kidneys and ducts
reproductive system functions
reproduction
structures of reproductive system
gonads and ducts
renal corpuscle is made up of
glomerulus and renal capsule
eliminate N as ammonia directly
requires water
ammonotelism
eliminate N as uric acid
uricotelism
use uricotelism
birds and reptiles
eliminate N as urea
ureotelism
uses ureotelism
mammals
maintaining body/ body fluid water and ion levels
osmoregulation
freshwater species osmoregulation problems
water comes in because body fluids are hyperosmotic to environment
eliminate excess water by dilute urine
seawater species osmoregulation problems
outward water flux via osmosis
body fluids are hyposmotic to environment
preserve water with concentrated urine and drinking water and salt glands
movement of water/solutes into renal capsule
glomerular filtration
along uriniferous tubule
selective secretion adds to filtrate
selective reabsorption of some components of filtrate
freshwater fish and amphibians
kidneys with large well-developed glomeruli
produce a lot of glomerular filtrate
lack glomeruli/renal capsule
aglomerular kidneys
saltwater species…
have aglomerular kidneys
lack distal tubule
what adaptation do mammals and birds have to conserve water
glomerular kidney with loop of henle
characteristics of loop of henle
allows creation of osmotic gradient
Na reabsorbed in loop creates hyperosmotic region
water reabsorbed by osmosis at collecting duct
Dehydration stress
antidiuretic hormone release
job of antidiuretic hormone
allow for reabsorpbion of more water
body fluid osmotic concentration equals that of the environment
osmoconformer
tolerate a range of salinities
euryhaline fish
