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Endocrine System
Glands and Hormones
43
Biology
Professional
12/15/2007

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Term
Endocrine System
Definition
made up of glands that release their products into the bloodstream.
Term

Hormones

Definition
are chemicals that travel through the boodstream and affect the activities of other cells.
Term
Target Cells
Definition
cells that have receptors for a particular hormone
Term
Gland
Definition
is an organ that produces and releases a substance.
Term
Exocrine Glands
Definition
release their secretions through tubelike structures called ducts.
Term
Endocrine glands
Definition
release their hormones directly into the bloodstream.
Term
Pituitary Gland
Definition
secretes nine hormones that directly regulate many body funcions and controls the actions of several other glands.
Term
Thyroid Gland
Definition

produces thyroxine, which is made up of the amino acid tyrosine and the mineral iodine.

Term
Hypothalamus
Definition
controls the secretions of the pituitary gland.
Term
Posterior Pituitary
Definition
made up of axons belonging to cells called neuroseretory cells.
Term
Parathyroid Gland
Definition
maintains homeostatic activities.
Term
Parathyroid Gland
Definition
secretes parathyroid hormone, which is important for promoting proper nerve and muscle function and bone structure.
Term
Pituitary Gland
Definition
a bean-sized structure that dagles on a slender stalk of tissue at the base of the skull
Term
Hypothalamus
Definition
controls the secretions of the pituitary gland.
Term
Hypothalamus
Definition
influenced by the level of hormones in the blood and by the sensory information collected by the central nervous system.
Term
Antidiuretic Hormone (ADH)
Definition
stimulates the kidneys to reabsorb water from collecting tubules.
Term
Oxytocin
Definition
stimulates the contractions of uterus during childbirth; releases milk in nursing mothers.
Term
Follicle-stimulating Hormone (FSH)
Definition
stimulates the production of eggs and sperm.
Term

Luteinizing Hormone (LH)

Definition
stimulates ovaries and testes; prepares uterus for implantation of fertilized egg.
Term

Thyroid-stimulating Hormone (TSH)

Definition
stimulates the synthesis & release of thyroxine fromthe thyroid gland.
Term
Adreno-corticotropic Hormone (ACTH)
Definition
stimulates release of some hormones from the adrenal cortex.
Term
Growth Hormone (GH)
Definition
stimulates protein synthesis and growth in cells.
Term
Prolactin
Definition
stimulates milk production in nursing mothers.
Term
Melanocyte-stimulating Hormone (MSH)
Definition
stimulates the melanocytes of the skin, incresing their production of the skin pigment melanin.
Term
Thyroid Gland
Definition
regulates the body's metabolism and produces thyroxine.
Term

Calcitonin

Definition

the hormone that decreases the level of calcium in the blood.

Term
Hyperthyroidism
Definition
results in nervousness, elevated body temperature, increased heart and metabolic rates, increased blood pressure and weight loss.
Term
Cretinism
Definition
a condition in which the skeletal system nor the nervous systemdevelops properly. Two effect of *answer* are dwarfism and severe mental retardation.
Term
Parathyroid Glands
Definition
maintain hemeostasis in blood calcium levels.
Term
Parathyroid Hormone (PTH)
Definition
regulates the calcium levels in the blood by increasing the reabsoprion of calcium in the kidneys and by increasing the uptake of calcium from the digestive system.
Term
Adrenal Glands
Definition
help the body prepare for and deal with stress. Releases Adrenaline, epinephrine and norepinephrine.
Term
Adrenal Cortex
Definition
the outer part of the adrenal gland. Secretes corticosteroids, adolsterone and cortisol.
Term
Adolsterone
Definition
regulates the reabsorption of sodium ions and the excretion of potassium ions by the kidneys.
Term
Cortisol
Definition
helps control the rate of metabolism of carbohydrates.
Term
Adrenal Medulla
Definition
regulated by the sympatheticnervous system. Releases epinephrine and norepinephine.
Term
Pancreas
Definition
it is an exocrine gland, but included in the endocrine system.
Term
Insulin and Glucagon
Definition
released from the pancreas whoich helps to keep the level of glucose in the blood stable.
Term
Alpha Cells
Definition
cells that release glucagon into blood.
Term
Beta cells
Definition
cells that release insulin into the blood.
Term
Diabetes Mellitus
Definition
a condition which ocurs when the pncreas produces too little insulin.
Term
Gonads
Definition
serves in the production of gametes and secetion of sex hormones.
Term
Ovaries
Definition
produces eggs (female)
Term
Testes
Definition
Produces sperm (male)
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