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Dat bio
excretion
Question | Answer |
---|---|
excretion is the removal of _____ produced by the body | metabolic waste |
______ of amino acids in the liver forms urea | deamination |
annelids excrete minerals and urea using | nephridia |
arthrodods excrete nitrogenous waste as _______ | uric acid |
________ arterioles enters the glomerulus | afferent |
________ arteiole drains the glomerulus | efferent |
Filtration occurs in _____ | glomerulus |
why is the afferent larger than efferent | -blood pa is much higher and drive filtration |
_____ secretes angiotensinogen whch is acted upon by renin secreted by _______ | liver; kidney |
Angiotensin_____ afferent and efferent arterioles. stimulates ____ and water __________ by prox tubule | constricts; Nacl; reabsorption |
tubular secretion | renal tubule extracts chemicals from blood to tubular fluid |
tubular reabsorption | substances from filtrate reabsorbed into blood primarily occurs in the Prox tubule |
tubular reabsorption is passive or active process? | active process |
wats the function of the nephron loop | form a salinity gradient that causes the collecting duct to conserve water |
significance of thick segment of ascending loop | reabsorb 25% Na + impermeable to water |
fluid entering the distal convoluted tubule is | highly diluted |
how does DCT regulate the tubular fluid concentration | the effects of hormones, like aldosterone, ANP |
"salt retaining hormone" | aldosterone |
role of aldosterone | causes the ascending loop to reabsorb Na and Cl when blood pa is low |
role of ANP | in response to high blood pressure, inhibits NaCl reabsorption by collecting duct |
role of ADH | in response to low blood pressure, makes Collecting duct more permeable to water |
parathyroid hormone | in response to low blood calcium,so increase phosphate exct=retion and increase Ca reabsorption |
____ release angiotensinogen; _____ release renin; ________ secretes Angiotensin converting enzyme (ACE) to convert angiotensin 1 to ________ | liver, kidney; lungs; angiotensin II |
Angiotensin II causes kidney to secrete ____ ; blood vessels to ___ that in turn _____ | aldosterone; constrict; increase blood Pa |
2/3 of water is reabsorbed by | PCT |
water is absorbed by pct via _____ with the aid of _______ | osmosis; aquaporin |
tubular secretion compensates for____ | waste removal during pct reabsorption |
________ directly causes stimulation of aldosterone release | low Na or high K in blood |
_______ indirectly induce aldosterone release | low blood Pa |
aldosterone affects the ______ and causes _______ | thick ascending loop; Na reabsorption and K secretion; decreased urine vol. |
_____ stimulates PTH release | low blood calcium |
PTH acts on ______ TO INCREASE phosphate excretion | prox tubule |
PTH acts on ______ and ____ to increase Ca reabsorption which ends up | DCT and thick ascending loop; increasing blood calcium levels |
how des ADH affect the KIdneys | increases the amt of aquaporins in the collecting duct and tubules |