L11 Calcium and Phosphate Homeostasis

Question 1

Factors Influencing Distribution of Ca2+ in the Plasma?

Answer 1

pH of Plasma (Acidosis displaces Ca2+ from proteins and anions => INCREASES Plasma Ca2+, Alkalosis => DECREASES Plasma Ca2+)

Plasma Albumin Concentration (Hypoalbinemia increases ionized Ca2+, Hyperalbunimenia decreases ionized Ca2+)

Question 2

Answer 2

Question 3

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Question 4

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Question 5

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Question 6

Answer 6

Question 7

Answer 7

Question 8

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Question 9

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Question 10

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Question 11

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Question 12

Answer 12

Question 13

Answer 13

Question 14

Plasma Ca2+ and Phospate is regulated primarily by ______ and _____ and to a lesser degree __________

Answer 14

Plasma Ca2+ and Phospate is regulated primarily by PTH and Calcitriol and to a lesser degree Calcitonin

Question 15

Most important action of ______________ is to ensure adequate absorption of Ca2 and Phosphate from the intestine whereas the most important action of ___________ is the release of Ca2+ and Phosphate from bone

Answer 15

Most important action of Calcitriol is to ensure adequate absorption of Ca2 and Phosphate from the intestine whereas the most important action of PTH is the release of Ca2+ and Phosphate from bone

Question 16

_______ and ___________ stimulate reabsorption of Ca2+ by TAL and distal tubule

_______ enhances Ca 2+ reabsorption by the distal tubule

Answer 16

PTH and Calcitonin stimulate reabsorption of Ca 2+ by TAL and distal tubule

Calcitriol enhances Ca 2+ reabsorption by the distal tubule

Question 17

_______ and ___________ inhibit the reabsorption of P whereas _________ enhances P reabsorption

Answer 17

PTH and Calcitonin inhibit the reabsorption of P whereas Calcitriol enhances P reabsorption