What are Hypophysiotropic factors?
a hormone that stimulates the rate of secretion of hypophysial hormones; for example, a releasing factor; hypothalamic (regulatory) factor.
What is the definition of a prohormone quizlet?
Prohormone = the precursor of a polypeptide hormone that is larger & less active than the hormone. Typically converted into the shorter, active hormone PRIOR to secretion.
How does this explain permissiveness in hormone action?
Permissiveness is the situation in which a hormone cannot exert its full effects without the presence of another hormone. Synergism occurs when two or more hormones produce the same effects in a target cell and their results are amplified.
Which is an example of long loop negative feedback?
Long-loop feedback describes negative feedback from a pituitary target gland (i.e. thyroid, adrenal, gonads) on the hypothalamus, e.g. cortisol inhibiting CRH (as well as ACTH) release.
Which is most likely a result of hypersecretion of growth hormone?
Acromegaly and gigantism are disorders of the abnormal excess secretion of growth hormone. Gigantism occurs when growth hormone hypersecretion occurs before the fusion of the long bone epiphysis and is characterized by tall stature.
Which is an accurate description of the posterior pituitary and its functions?
Which is an accurate description of the posterior pituitary and its functions? It is neural tissue, and vesicles containing oxytocin and vasopressin are transported to axon terminals there. Which would result from a vitamin D deficiency? Which stimulates the secretion of growth hormone?
Which is a function of the Gonadotropic hormones?
Gonadotropin-releasing hormone causes the pituitary gland in the brain to make and secrete the hormones luteinizing hormone (LH) and follicle-stimulating hormone (FSH). In men, these hormones cause the testicles to make testosterone. In women, they cause the ovaries to make estrogen and progesterone.
What causes acromegaly and gigantism?
Acromegaly is a hormonal disorder that develops when your pituitary gland produces too much growth hormone during adulthood. When you have too much growth hormone, your bones increase in size. In childhood, this leads to increased height and is called gigantism.
Where is anterior pituitary?
The anterior pituitary is the front lobe of your pituitary gland, which is a small, pea-sized gland located at the base of your brain below your hypothalamus. Your pituitary gland is a part of your endocrine system and controls the function of several other endocrine glands.
What is prehormone and prohormone?
is that prohormone is (hormone) a substance that is a precursor to a hormone, usually having minimal hormonal effect by itself while prehormone is (biochemistry) a substance secreted by glandular tissue that has little or no significant biological activity, but is converted in peripheral tissues into an active hormone.
What is the purpose of Preprohormone?
A preprohormone is the precursor protein to one or more prohormones, which are in turn precursors to peptide hormones. In general, the protein consists of the amino acid chain that is created by the hormone-secreting cell, before any changes have been made to it.