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20 Cards in this Set
- Front
- Back
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Name the 3 types of hormones.
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Peptide hormones
Steroid hormones Tyrosine derivatives |
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Peptide hormones
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Proteins: not diffusible through membrane, must bind to membrane bound receptor.
They are water soluble. |
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Steroid hormones
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lipid soluble, diffuses thru membrane and acts on nucleus
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Tyrosine derivatives
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Thyroid: act on nucleus
Catecholamines: receptor |
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Does a person have high blood glucose have high levels of insulin or high levels of glucagon?
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Insulin because of negative feedback. Insulin decreases glucose levels.
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What type of hormones does cortex produce?
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Steroids.
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What type of hormones does the thyroid produce?
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Tyrosine deriv. - T3, T4
Peptide - Calcitonin |
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What type of hormones does the medulla produce?
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Catecholamines.
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Name 6 major Anterior Pituitary hormones.
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All are peptides:
hGH ACTH TSH FSH LH prolactin |
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hGH : Human growth hormone
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increases mitosis, cell size, protein synthesis, mobilize fat stores, increase use of fatty acids, decrease use of glucose.
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ACTH: adrenocorticotropic hormone
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peptide, ant. pit.
stimulates adrenal cortex to release glucocorticoids vis 2nd messenger system using cAMP. Release stimulated by stress. |
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TSH: Thyroid-stimulating hormone
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peptide, ant. pit.
Stimulates thyroid to release T3, T4 via 2nd messenger system. using cAMP. Increases thyroid cell size, number, rate of secretion of T3 and T4, which in turn decreases TSH prod. in ant. pit. and hyp. |
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FSH, LH
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peptides, ant. pit.
reproduction hormones |
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Prolactin
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peptide, ant. pit.
lactation usually inhibited suckling -> hyp. -> ant. pit. -> prolactin release & inhibits menstruation |
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Name 2 Posterior Pituitary hormones.
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Oxytocin
ADH Both are small peptides produced in the hypothalamus and transported down axons to the post. pit. where they are released into the blood. |
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Oxytocin
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peptide, post. pit.
increases uterine contractions causes milk ejection |
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ADH: Antidiuretic hormone/Vasopressin
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causes collectecting ducts of the kidney to become permeable to water - reduces and concentrates urine.
increases BP Coffee and beer block ADH |
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Adrenal Cortex
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Aldosterone (mineral corticoid)
Cortisol (glucocorticoid) |
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Adrenal Medulla
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Catecholamines:
Epinephrine, Norepinephrine |
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Aldosterone
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mineral corticoid
Na+ reabsorption K+ secretion in collecting tubule of kidney then increase in BP |
