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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Blood levels of calcium are regulated directly by

insulin synthesized by the alpha cells of the pancreas.

PTH made by the pituitary.

vitamin D activated in the liver.

prolactin synthesized by the anterior pituitary.

calcitonin secreted by specialized thyroid cells.

Summary Introduction

Introduction:

The electrolytes are the minerals, which are present in the body tissues and blood. They are usually present in the form of dissolved salts. The electrolytes in the body help in the conduction of the electrical impulses in the body. Some of the common electrolytes in the body are sodium, calcium, potassium, chloride, and bicarbonate.

Explanation

Justification for the correct answer:

Option (e) is calcitonin, secreted by specialized thyroid cells. This option is correct as calcitonin is a peptide hormone produced by the specialized cells of the thyroid gland. It directly acts on bones and lowers calcium concentration in the blood. Hence, option (e) is correct.

Justification for the incorrect answers:

Option (a) is insulin, synthesized by the alpha cells of the pancreas. This is false, as the insulin is produced by the beta cells of the pancreas. Insulin is involved in the regulation of glucose levels in the blood and not calcium levels. So, it is an incorrect option...

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