QuestionSBA
QuestionChoice
PTH decreases phosphate reabsorption, which results in more ionised calcium in the blood, as there are fewer phosphate ions to form salts with calcium.
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b
Decreases phosphate reabsorption in the proximal convoluted tubule
QuestionChoice
PTH stimulates osteoclasts to break down bone which releases the calcium and phosphorus.
10006664
d
Increases calcium and phosphorus release from bone
QuestionChoice
PTH increases calcium reabsorption in the kidneys, which also decreases urinary calcium excretion.
10006661
a
Decreases calcium reabsorption in the kidneys
QuestionChoice
PTH stimulates the formation of this active form of vitamin D. Vitamin D then exerts negative feedback on PTH secretion. The active form of vitamin D increases the amount of calcium absorbed in the small intestine and decreases loss from the kidneys.
10006665
e
Increases 1,25-dihydroxyvitamin D production in the kidney
QuestionChoice
PTH increases dietary calcium reabsorption from the duodenum and jejunum, and into the blood.
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c
Increases calcium reabsorption in the small intestine
Concept
Chapter
2693
4529
Hormonal control of calcium
Topic
228
Musculoskeletal Physiology
13879
Which of the following is not an effect of parathyroid hormone (PTH)?
a