nau bio 202 exam 4 rometo Questions With Correct Solutions, Already Passed!!
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Course
Nau bio 202
Institution
Nau Bio 202
physical characteristics of the kidneys: - - wrapped in fat capsule
- bean shaped
- laterally convex
- medial indentation
3 major processes that result in urine formation - - glomerular formation
- tubular reabsorption
- tubular secretion
according to the myogenic regulation of GFR, an incre...
nau bio 202 exam 4 rometo
physical characteristics of the kidneys: - - wrapped in fat capsule
- bean shaped
- laterally convex
- medial indentation
3 major processes that result in urine formation - - glomerular formation
- tubular reabsorption
- tubular secretion
according to the myogenic regulation of GFR, an increase in BP = AAs stretch and an increase in GFR is
countered by: - vasoconstriction of AA to bring GFR back down to normal
Because of various endocrinological issues, your patient has been struggling with his weight for years.
Though he has undergone countless lifestyle changes, including diet and exercise, he cannot seem to
loose enough weight to drop out of the "morbidly obese" range. As such, he decided to undergo bariatic
(stomach bypass) surgery. In preparing him for surgery, you inform him he will have to take oral forms of
vit B12 to prevent pernicious anemia.
Why is this? - in order to absorb vit B12 in the small intestine, intrinsic factor is needed. with
stomach bypass surgery, the stomach is "bypassed" so intrinsic factor secretion from the parietal cells
does not enter into the small intestine. Thus, vit B12 can not be absorbed in the small intestine and
there would be a decrease in RBC production, thus causing pernicious anemia.
extrinsic: hormonal - - decrease in BP and decrease in blood flow to kidneys
- renin-angiotensin-aldosterone system
- salt deficit
- decrease blood vol
- decrease blood pressure
extrinsic: neural - - sympathetic nervous system
, - very low BP
- shunt blood from kidney
- SNS releases epi and norepi
- vasoconstriction increases BP
- constriction AA= decreased GFR and increase blood vol and BP
glucose is reabsorbed from the nephron lumen into the nephron cell via: - cotransport (symport)
with sodium
importance of intrinsic factor and B12 in RBC formation? - - intrinsic factor is necessary for B12
absorption in small intestine
- vit B12 is needed for RBC
- without vit B12 = vit B12 deficiency = pernicious anemia
in order to micturate, the following must happen (3): - - contraction of the internal urethral
sphincter
- contraction of the external urethral sphincter
- relaxation of the detrusor muscle
intrinsic: myogenic - - increased BP causes afferent arterioles to stretch= glomerulus works faster
- this causes AAs to vasoconstrict= GFR to decrease
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