Endocrine System Quiz

The main organs of the endocrine system are the pituitary gland, thyroid gland, parathyroid gland, adrenal gland, and pineal gland.

Hormones are chemical signals that affect the activities of other glands or tissues.

Hormones help regulate the composition and volume of the internal environment, metabolism and energy balance, contraction of smooth and cardiac muscle fibers, granular secretions, and some immune system activities.

<p>Down regulation refers to a decrease in the number of target cell receptors when a hormone is present in excess.</p> Signup and view all the answers

<p>Up regulation refers to an increase in the number of target cell receptors when a hormone is deficient.</p> Signup and view all the answers