Exam 42: The Endocrine System

Explain negative feedback control using thyroid hormones as an example.

When human volunteers were given high doses of AAS, ____

Prostaglandins are ____.

Describe amplification of hormone action.

Select the appropriate order of hormone action.

In insects, the level of ____ controls the formation of a pupa.

A cell that contains a receptor for a hormone is known as a(n) ____.

The actions of insulin and glucagon are ____.

Oxytocin can generate feelings of well-being as well as anxiety and stress .

A hormone that is hydrophobic, derived from cholesterol, and binds to intracellular receptors is most likely a(n) ____ hormone.

The posterior lobe of the pituitary gland stores and secretes ____.

Target cells for steroid hormones and thyroid hormones do not have membrane receptors for these hormones because they ____.

Oxytocin is secreted by the posterior pituitary in females only .

Fruit flies, mollusks, and humans all have insulin-like hormones and receptors , even though molecular studies suggest that their last common ancestor existed more than 800 million years ago.

A patient has very low plasma glucose levels, a condition called hypoglycemia. The problem is not associated with insulin, but with the secretion of glucocorticoids. How would you evaluate the patient to determine where in the feedback system the problem is located?

Figure 42.1D -Answer the question using the accompanying figure. This figure illustrates ____ signaling.

Melatonin levels in mammals are regulated by a(n) ____.

The ____ gland has a neurosecretory component as well as a component that is not under direct neural control.

Negative feedback loops to the hypothalamus and the pituitary operate to regulate the levels of ____, the most important regulator of thyroid hormone secretion.