First slide

Human Endocrine System

Question

In response to high levels of blood calcium,

Easy

A

Parathyroids secrete TCT
B

Parathyroids secrete PTH
C

Thyroid secretes TCT
D

Thyroid secretes PTH

Solution

Parathormone (PTH) is a hypercalcemic hormone secreted by the parathyroid glands. Thyrocalcitonin (TCT) is a hypocalcemic hormone secreted by the parafollicular cells of the thyroid gland. These two hormones maintain calcium homeostasis. An increase in blood calcium levels stimulates the release of TCT while a decrease in blood calcium levels stimulates the release of PTH.

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