Lipid-soluble hormones bind to ____________ receptors.

How do lipid-soluble hormones carry out their actions at their target cells?

The zona fasciculata in the adrenal gland secretes what?

What happens when α1 adrenergic receptors are activated?

Lipophilic hormones bind to _____ receptors of target cells.

What types of receptors will be activated when you get a paper cut on your finger?

What is the only way for a hormone to reach a target cell?

List three functions of membrane proteins.

How positive and negative feedback from target organs regulate pituitary function?

A red blood cell is placed in a hypertonic solution. This means the concentration of solutes in the solution is __________ than the concentration of solutes in the intracellular fluid and will cause the cell to __________.

A. higher; swell

B. lower; swell

C. higher; shrink

D. lower, shrink

E. lower; burst

Discuss the difference in mode of action between amine, peptide, and steroid hormones.

A rise in blood calcium levels directly stimulates

a. parathyroid hormone secretion.

b. calcitonin secretion.

c. 1,25-dihydroxyvitamin $D _3$ formation.

d. all of these.

Hypoglycemia (low blood sugar) and hyperglycemia (high blood sugar) are potentially dangerous and occur when a person's blood sugar fluctuates by more than 38 mg from the normal blood sugar level of 88 mg. Write and solve an absolute value inequality to describe blood sugar levels that are considered potentially dangerous.

When one is experiencing a stressful event, which nervous system or division is at work?