kashdoc21
Forum Senior
Topics: 52
Posts: 127
|
Q. A 3-year-old boy has a mutation in the calcium receptors on cell surfaces of his parathyroid gland and on the basolateral (blood) side of the thick ascending limb of the loop of Henle. Which of the following patterns is expected with a mutation that leads to activation of this receptor in the absence of binding of its ligand, calcium? Ca2+ Serum PTH Urine Ca2+ a) Hypercalcemia high high b) Hypercalcemia high low c) Hypercalcemia low high d) Hypercalcemia low low e) Hypocalcemia high high f) Hypocalcemia high low g) Hypocalcemia low high h) Hypocalcemia low low PLEASE EXPLAIN ....
|
| fox
Forum Guru
Topics: 70
Posts: 727
|
F...this has already been discussed. pls search previous post
___________________
Aim High
|
| laura81
Forum Elite
Topics: 32
Posts: 175
|
where was it discussed ?
|
| laura81
Forum Elite
Topics: 32
Posts: 175
|
fox ..can u pls explain the answer..
|
| fox
Forum Guru
Topics: 70
Posts: 727
|
http://www.prep4usmle.com/forum/comments.php?id=4...
___________________
Aim High
|
| kashdoc21
Forum Senior
Topics: 52
Posts: 127
|
please explain
????
|
| drbin
Forum Guru
Topics: 27
Posts: 535
|
in the absence of Ca2+ ( so hypocalcemia) leading to secondary hyper parathyroidism( high PTH) leading to increased reabsorption of Ca2+ from renal PCT (low urine Ca2+) so the answer is F
___________________
action speaks better than words
|
|
| |
| | | | | | | |
