Endocrine control of calcium metabolism Flashcards

1
Q

What are the regulators of the parathyroid hormone

A

Low Ca

high phosphate

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2
Q

what are the actions of the PTH in the bone

A

short term - rapid exchange

long term - resorption

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3
Q

What are the actions of PTH in the kidney

A

Reabsorption of Ca2+
Excretion of PO4 3-
formation of vit d

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4
Q

What are the actions of the GI in the bone

A

Ca2+ absorption

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5
Q

Relationship between Ca2+ and PTH

A

Low levels of Ca2+ and high levels of PTH

negative feedback

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6
Q

Causes of hypocalcaemia

A

hypoparathyroidism - removal/injury of parathyroid glands
Pseudohypoparathyroidism- cells unresponsive
Vit D deficiency

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7
Q

Clinical signs of hypocalcaemia

A

neuromuscular hyperexicitability

Calcium stabilies RMP - threshhold reached more easily

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8
Q

Causes of hyperparathyroidism

A

Increase in serum Ca2+

all forms of hyperparathyroidism

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