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