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22 Cards in this Set

  • Front
  • Back
a chemical signal that is secreted into the extracellular fluid, is carried by the circulatory system, and communicates regulatory messages within the body
endocrine glands
secrete their products into body fluids.

ex. thyroid gland, parathyroid, pituitary and adrenal glands, pancreas
exocrine glands
secrete into ducts that lad to a body surface

ex. sweat glands, salivary glands, and sebaceous glands
steroid hormones
-steroids or steroid-like compounds synthesized from cholesterol (ex. estrogen, testosterone, cortisol, aldosterone)
-soluble in lipids, including cell membranes
-bund with receptor proteins in the nucleus, binding to the DNA and altering it
nonsteroid hormones
-include amines, peptides, proteins, or glycoproteins (ex. epinephrine, ADH, GH, FSH, LH, and T3)
negative feedback
-When an imbalence in hormone concentration occurs, information is fed back to the nervous or endocrine system to correct it.
-stabilizes the concentration of many hormones.
-can be in response to nerve impulses, other hormones (antagonistis pairs), or nerve cells.
antagonistic pairs
Respond directly to some change in external environment

ex. insulin and glucagon, changes in blood sugar concentrations
pituitary gland
-has anterior and posterior lobes
-secretions are controlled by hypothalamus
-pea-sized organ located in the middle of the head (in humans)
controls pituitary glad secretions
releasing hormones
from hypothalamus, make the anterior pituitary release its hormones
inhibiting hormones
from hypothalamus, make the anterior pituitary stop releasing hormones
posterior pituitary hormones (2)
Antidiuretic hormone (ADH) and Oxytocin (OC)
antidiuretic hormone (ADH)
causes kidneys to reduce the amount of water they release, reduces urine production, regulated by the hypothalamus
growth hormone (GH), prolactin (PRL), thyroid stimulating hormone(TSH), adrenocorticotropic hormone(ACTH), follicle stimulating hormone (FSH), luteinizing hormone (LH), melanocyte stimulating hormone(MSH), various endorphins (which limit the perception of pain)

-mostly nonsteroid
anterior pituitary hormones
Growth hormone (GH)
Prolactin (PRL)
Thyroid stimulating hormone (TSH)
Adrenocorticotropic hormone (ACTH)
thyroid gland