Question

Select the correct option statement regarding the hypothalamic hormones _____.

• A. Growth hormone secretion is regulated by GHRH
• B. Blood flows from the anterior pituitary to the hypothalamus in portal vessels.
• C. Hypothalamic releasing hormones are synthesized and secreted by neuron
• D. The hypothalamic releasing hormones reach through general circulation.

Answer 1

The correct option is C

Hypothalamic releasing hormones are synthesized and secreted by neuron

The neurosecretory cells of the hypothalamus, when stimulated, release hormones, called neurohormones via axons into the capillaries. The neurohormones are carried by the portal blood to the anterior lobe of the pituitary gland and stimulate the latter to release its hormones. On this account, such hypothalamic hormones are also called releaser hormones. Certain hypothalamic hormones inhibit the secretion of some pituitary hormones. These are termed inhibitory hormones or factors (IH or IF).