kidney Flashcards
(18 cards)
where does blood come from that goes into the kidney
renal artery
what is the glomerulus
a bundle of capillaries at the start of the nephron
what happens in the glomerulus
a high pressure builds up which squeezes water, urea, ions and glucose out of the blood into the Bowmans capsule
what do the membranes between the glomerulus and Bowmans capsule act as, and why
-filters
-so proteins and blood cells aren’t squeezed out
what is the filtered liquid in the Bowmans capsule known as
glomerular filtrate
what are the two stages called in the kidneys
-selective reabsorption
-ultrafiltration
where is ALL the glucose reabsorbed from
proximal convoluted tubule
why is glucose reabsorbed
for respiration
what does the reabsorption of glucose include
active transport, against the concentration gradient
what ions are reabsorbed
sufficient ions
where are sufficient ions reabsorbed into the bloodstream and how?
-collecting duct
-osmosis
what is the path the remaining substances take when they continue out the nephron
to ureter to bladder to urethra
what is the name for balance of body water levels
osmoregulation
what controls the amount of water reabsorbed by the kidney
ADH
where is ADH released from
pituitary gland
what does ADH do when water levels decrease in the body
-increase the permeability of the kidney tubules to water
what does ADH do when water levels increase in the body
increase water reabsorption back into the bloodstream
what does the hypothalamus do and where is it
-in the brain
-regulating body temperature, water balance
