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Block 3 Week 5 Meg > Keef Supplemental Questions > Flashcards

Flashcards in Keef Supplemental Questions Deck (17):
1

How is most of the calcium in the proximal tubule reabsorbed?

paracellularly (between cells)

2

Movement of calcium into tubular epithelial cells is (up/down) an electrochemical gradient?

DOWN

3

How much of plasma Ca+ is available for ultrafiltration?

60%

4

Decreased plasma calcium concentration leads to enhanced (blank) formation by the kidneys

calcitriol

5

Is calcitonin essential for life?

NO

6

Is Ca+ transport directly enhanced by PTH in both the kidney and intestinal epithelium?

NO!

7

Slight elevation of calcium or phosphorous can lead to (blank)

ectopic calcification

8

What percentage of calcium is found in bone and teeth? What percentage of phosphorus is in bone and teeth?

99%; 86%

9

How much of calcium is excreted in urine? How much of phosphorus is excreted in urine?

1%; 10%

10

Is more calcium or phosphate excreted in the feces?

CALCIUM

11

Is more calcium or phosphate exchanged with bone daily?

CALCIUM

12

Calcitriol enhances formation of (blank) in epithelial cells of the small intestine

calbindin

13

Calcitriol augments the actions of (blank) in bone

PTH

14

Calcitriol is essential for adequate absorption of (blank) by the intestine

calcium

15

PTH enhances bone (blank), enhances (blank) levels in the renal tubule, enhances (blank) formation, and decreases (blank) reabsorption in the kidneys

remodeling; cAMP; calcitriol; phosphate

16

PTH stimulates calcium reabsorption in the (blank) and inhibits phosphate reabsorption in the (blank).

distal tubule; proximal tubule

17

4 treatments for osteoporosis

1. bisphosphates
2. calcitonin
3. estrogen
4. PTH