A&P 2 Lab 2/Ch. 17 Endocrine System

Hypothalmic Hormones

- Antidiuretic hormone (LH) - Thyrotropin-releasing hormone (TRH) - Prolactin-inhibiting hormone (PIH)

The two major thyroid hormones (T3 and T4) are

hydrophobic and are stored in the (extracellular) thyroglobulin.

What makes a cell a target of a particular hormone?

the presence of a receptor for that particular hormone

The ___ secretes a hormone that increases the body's metabolic rate, promotes alertness and quickens reflexes, and stimulates the fetal nervous system.

thyroid gland

Thyroid-stimulating hormone is released into the blood and directly affects cells in the

thyroid gland.

Endocrine glands secrete?

true hormones

This hormone plays an important role in synchronizing physiological function with the cycle of daylight and darkness.

Melatonin

Antidiuretic hormone (ADH) targets the?

Kidneys

Thyroid-releasing hormone (TRH) is secreted by

neurosecretory cells in the hypothalamus

True hormones influence?

target cells some distance from the gland

The ___ secretes several hormones that stimulate the development of lymphatic organs and regulates development and activity of T cells (white blood cells).

thymus

Follicular and parafollicular cells are associated with the ____ gland.

thyroid

Target organs most often regulate the pituitary gland via?

Negative feedback inhibition

Paracrine secretions influence?

Neighboring cells

Endocrine gland that also has ducts that function to secrete digestive juices?

Pancreas

Which endocrine gland stores hormones synthesized by the hypothalamus

Posterior pituitary

The infundibulum is?

a projection of the hypothalamus from which the pituitary gland hangs.

Which of the following endocrine glands is in close proximity with the kidneys?

adrenal

What hormones does the adrenal medulla secrete?

epinephrine and norepinephrine

The _____ produces hormones stored in the posterior pituitary.

hypothalamus

Hormone levels are typically controlled by ______ feedback mechanisms.

negative

Which two endocrine glands have the closest proximity to each other?

Thyroid; Parathyroid