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Set 9 7 The Calcitropic Hormones

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Question 1

(Multiple Choice)

Free
Calcitonin is secreted by

A) Four small glands embedded in the thyroid gland
B) Parafollicular cells in between the thyroid follicles
C) Glands located at the top of the chest cavity
D) Osteoblasts
E) Patches of endocrine tissue located in the gut

Answer

Question 2

(Multiple Choice)

Free
Calcium and Phosphorus homeostasis are linked because

A) Both Ca and Phosphate are released when bone is resorbed
B) Both Ca and Phosphate are in the urine
C) Ca complexes with phosphate in the blood
D) Both Ca and Phosphate are absorbed in the intestine
E) Both A and C are true

Answer

Question 3

(Multiple Choice)

Free
W hich of the following is NOT an action of PTH?

A) It increases activation of vitamin D by stimulating the 1 α\alpha hydroxylase reaction
B) It increases osteocytic osteolysis
C) It increases osteoclastic osteolysis
D) It increases urinary excretion of phosphate
E) It increases intestinal absorption of calcium

Answer