Chemical messengers that are transported by bloodstream, these stimulate physiological responses in cells of another tissue or organ, often a considerable distance away.

Located in the brain, this helps to regulate primitive functions from water balance to sex drive

This gland regresses rapidly after the age of 7 and is known to produce serotonin by day and convert it to melatonin at night

One of the 3 different chemical classes of hormones, this is derived from cholesterol and includes sex steroids, corticosteroids, and calcitrol

Secreted by the posterior pituitary gland, this hormone aids in water retention

Responsible for the production and secretion of hormones, this gland does not have any ducts

Also known as the adenohypophysis, this is linked with the hypothalamus by way of the hypophyseal portal system

Found in the pineal gland and the thymus, this word is defined as the shrinkage of an organ

One of the 3 different chemical classes of hormones, this is a chain of 3 to 200 amino acids which includes dopamine, epinephrine, and norepinephrine

Secreted by the hypothalamus, this hormone promotes the secretion of growth hormone

This system communicates by means of electrical impulses and usually has relatively local, specific effects

Housed in the sella turcica, this gland carries out many of the functions of the hypothalamus

The largest adult gland to have a purely endocrine function, this gland receives one of the highest rates of blood flow per gram of tissue

In order to travel in the watery blood stream, hormones must bind to this type of transport proteins

Secreted by the hypothalamus, this hormone inhibits the secretion of growth hormone

One of the 4 principe avenues of communication from cell to cell, these joins single-unit muscles to each other and enable cells to pass nutrients, electrolytes, and signaling molecules directly from the cytoplasm of one cell to the cytoplasm of the next through pores in their plasma membranes

Containing one-quarter of the pituitary, this gland has nerve fibers that arise from certain cell bodies in the hypothalamus, pass down the stalk as a bundle which is called the hypothalamo-hypophyseal tract

One of the 3 layers of the adrenal cortex, this is the thick middle layer that secretes glucocorticoids and androgens

Steroid and thyroid hormones are this, which means they must bind to transport proteins for transport

Secreted by the anterior pituitary gland, this hormone aids in milk synthesis

When a hormone is traveling through the blood stream, this specific type of cell will respond to its corresponding hormone

The pituitary stimulates another endocrine gland to secrete its hormone, and that hormone feeds back to the pituitary or hypothalamus and inhibits further secretion of the pituitary hormone. This process is known as

Also known as parafollicular cells, these cells from the thyroid gland secrete calcitonin which reduces blood calcium mainly in children

One the cellular steps of peptide synthesis, this organelle removes the segment and forms a pro-hormone

Secreted by the posterior pituitary gland, this hormone aids in labor contractions and milk release