Endocrine or Nervous
close to site of release, at a synapse; binds to receptors in postsynaptic membrane
what is sit of mediator action in the Nervous System
causes the release of lutenizing hormone(LH) and follicle stimulating hormone(FSH) hormones
what is Gonadotropin Releasing Hormone(GnRH)
no ducts(ductless)
secrete hormones into bloodstream
what is the Endocrine System
nerve impulses stimulated hormone release
what is Neural Stimulus
derived by the modification of amino acids; synthesized from amino acids tryptophen or tyrosine
seconds to hours or days
what is time to onset of actions in the Endocrine System
causes release of growth hormone
what is Growth Hormone Releasing Hormone (GHRH)
chemical messengers
what are hormones
respond to changes in blood composition
what is Humoral Stimulus
one are short chains of amino acids, the other is longer polypeptides
what is Peptide and Protein hormones
hormones delivered to tissues throughout the body by the blood
what is mediator molecules in the Endocrine System
-inhibits the release of growth hormone
-
what is Growth Hormone Inhibiting Hormone (GHIH)
glandular tissue
secretes 6 hormones
what is Anterior pituitary (adenohypophysis)
what is Hormonal Stimulus
lipids derived from cholesterol; synthesized and released from the adrenal cortex, gonads(testes and ovaries) and placenta during pregnancy
what is Steroid hormones
generally briefer(milliseconds)
what is duration of action in the Nervous System
causes the release of Thyroid Stimulating Hormone (TSH)
what is Thyrotropin Releasing Hormone(TRH)
nervous tissue
secretes/releases 2 hormones secreted in hypothalamus
what is Posterior pituitary (neurohypophysis)
respond due plasma concentration of certain ions or nutrients
what is Humoral Stimulus
have important effects on the metabolism of glucose and cortisol; also plays a role in regulation of stress and immune response
what is Cortisol and Corticosterone
muscle(smooth, cardiac, and skeletal) cells, gland cells, and other neurons
what is types of target cells in the Nervous System
causes the release of Adrenocorticotropic Hormone(ACTH)
what is Corticotropin Releasing Hormone(CRH)
connects hypothalamus to anterior pituitary
what is the Hypophyseal portal system
hormones that activate the secretion of another hormone are called Tropic hormones
what is Hormonal Stimulus
different layers of the adrenal cortex are responsible for productivity different types of steroid hormones
what is Androgens