Exam 18: Endocrine System

Which of the following is not a chemical classification of hormones?

Both the endocrine and nervous systems exhibit control via regulatory feedback loops.

The production of thyroid hormone is stimulated by another hormone from the:

Which of the following is not a description of hormone interaction explained in the text?

Synergism in hormone activity can be defined as:

Two specific prostaglandins are thromboxanes and leukotrienes.

The control of hormone secretion is usually a positive feedback loop.

Steroid hormones tend to generate a rapid response in their target cells.

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.

The cAMP system,the inositol triphosphate (IP₃)system,and the mobile-receptor system are second messenger systems used by nonsteroid hormones.

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

All nonsteroid hormones operate according to the second messenger model.

Which of the following is not a source of nonsteroid hormones?

Both steroid and nonsteroid hormones produce their effects by increasing the number of enzymes that catalyze cellular reactions.

Some nonsteroid hormones do not use a second messenger but are taken into the cell by endocytosis and act directly on their target cells.

Some endocrine glands are actually made of nervous tissue.

Hormones that are antagonistic to each other are able to "fine tune" the activity of the target cell with great accuracy.

The fixed-membrane-receptor model is used in describing the action of nonsteroid hormones.

Match each term with its explanation or definition. -hormone that targets another endocrine gland

Thyroid hormones are nonsteroid hormones but act more like steroid hormones when they reach their target cells.