BIO FINAL: pt. 1
Card Set Information
BIO FINAL: pt. 1
key terms concepts
key terms and concepts
primary organ for regulating chemical enviroment and ion balance
functional unit of the kidney
function of nephron
determines what is kept and what is waste
regulates blood pressure and pH
ball of capillaries that performs the first step in filtering blood from urine
walls of glomerulus are:
non-selective for small particles
ascending tube of Loof of Henle
impermeable to water, actively (uses ATP) to transport Na+out of tubule
permeable to water
water is recovered
water moves out of the nephron and into tissues due to:
osmotic gradient set by ascending arm
an atidiuretic released by the pituitary gland that controls permeability of collecting ducts
series of tubules and ducts that connect the nephrons to the ureter
function of collecting duct
participates in electrolyte and fluid balance through reabsorption and excretion
happens when ADH is released:
more water is retained by the body
urine is more concentrated
ADH is produced when:
low blood pressure
where does blood enter the kidney?
through th renal artery
where does filtration occur?
the glomerulus of the nephron
what tubule is permeable to water?
descending tube of Loop of Henle
where are the highest levels of Na+?
near the base of the ascending tube
what does ADH stand for?
what does ADH production depend on?
osmotic concentration of blood and blood pressure
3 times when is ADH produced:
when blood pressure is low
in animals, what drives survival, reproduction, and fitness?
what controls the body temp. and in what type of animals?*
causes an increase in body temp., causing a fever*
makes the fat deposits brown in hibernating animals*
in brown fat deposits, why does the mitochondria produce only heat?*
difference between climate and weather*
in homeotherms, what does weather drive?*