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Calcium Homeostasis

Blood calcium...

Question

Blood calcium level is lowered due to the deficiency of

A

calcitonin

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B

parathormone

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C

both calcitonin and parathormone

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D

pancreatic juice and parathyroid

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Solution

The correct option is B parathormone
Parathormone is secreted by the chief cells of the parathyroid gland. It regulates the metabolism of calcium and phosphate. It increases calcium absorption from the intestine and also increases calcium resorption from the nephons of the kidneys. So, its deficiency leads to low blood calcium level.

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Q. Calcitonin lowers the calcium level in the blood. This is secreted by

Q. Assertion :Hormone calcitonin has antagonistic effect to that of parathormone. Reason: Calcitonin decreases blood calcium level while parathormone increases blood calcium level.

Q. The pineal gland secretes a hormone progesterone which helps to regulate sleep pattern. Thyroid glands release hormone which regulate the level of calcium in the blood with the help of calcitonin which is produced in the parathyroid glands. Select the correct option regarding the given paragraph.
i) Positions of pineal and parathyroid should be interchanged
ii) Progesterone must be replaced by melatonin
iii) Parathyroid should not be replaced as it is correctly mentioned.
iv) Positions of progesterone and calcitonin should be interchanged
v) Positions of thyroid and parathyroid should be interchanged

Deficiency of which hormone leads to low level of calcium in blood:

Q. Thyroid gland secretes a hormone called calcitonin, which lowers the amount of calcium in blood.

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