Exam 25: Endocrine Regulation

Hormones are synergistic if they have opposite effects on the target cell.

The common molecule from which all steroid hormones are derived is:

Match each term with its explanation or definition. -Usually requires a second messenger to function

Input from the nervous system influences secretion of some hormones.

Autocrine hormones have to travel farther to reach their target cell than do paracrine hormones.

Hormones that regulate activity in the secreting cell itself are called:

The "lock-and-key" mechanism allows hormones to bind only with target cells that have receptors that "fit" them exactly.

What are prostaglandins? From what substance are they made? Name two effects prostaglandins have on the body.

The chemical messengers of the endocrine system are neurotransmitters.

When a hormone attaches to a target cell, which of the following can occur?

All of the following are true statements except:

Protein hormones that contain lipid molecules can be classified as glycoprotein hormones.

Norepinephrine can be considered a neurotransmitter or a hormone, depending on what releases it and how far it must travel to reach a receptor.

The name prostaglandin comes from the prostate gland.

The endocrine system functions at a much greater speed than the nervous system.

Which of the following does not act as a second messenger for nonsteroid hormones?

All nonsteroid hormones operate according to the second-messenger model.

Cells either have receptors for neurotransmitters and respond to the nervous system or have hormone receptors and respond to the endocrine system, but not both.

There are 16 structural classes of prostaglandins, classes A though P.

Because most cells secrete prostaglandins, there is usually a fairly high concentration of prostaglandins in the blood.