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6 Cards in this Set

  • Front
  • Back
Which of these things is not true about water soluble hormones:
a) they have specific target receptors on cell membranes
b) they secrete directly into the blood stream
c) chatecolamines are the same chemicals that act as neurotransmitters secreted by nerve cells in the brain
d) these hormones are excreted through various ducts into tissues throughout the body.
D) hormones secrete directly into the blood stream through endocrine glands which have no ducts. Excretion would mean they were going through ducts (exocrine glands)
Which hormones are not water soluble?
Thyroid hormones, adrenal cortex hormones: (ACTH: adrenocorticotropic hormone stimulates these hormones in adrenal cortex: outer layer zona glomerulosa-aldosterone; middle: zona fasciculata-glucocorticoids: cortisol, corisone, and corticosterone; and zona reticularis, inner layer of cortex mineral-corticoids: aldosterone...and other steroids...) and then sex glands: ovaries: secrete estrogen, and progesterone and testes secrete testosterone. They are steroids or lipid soluble hormones.
What hormones are secreted from the anterior pituitary gland and the posterior pituitary gland?
The anterior part of the pituitary gland (which is connected to the hypothalamus by the infindibular stalk) accounts for 80% of the pituitary gland weight. Several of the hormones secreted by the anterior are called tropic hormones. They control secrtion of hormones by other glands like TSH (called thyroid STIMULATING hormone) stimulates the tyroid gland to secrete thyroid hormones. And ACTH (adrenocorticotropic hormone) stimulates the adrenal cortex on the adrenal gland to secrete corticosteroids like cortisol. FSH (follicle stimulating hormone) stimulates the secretion of estrogen in the ova and testosterone for the production of sperm. FSH is also considered a gonadotropic hormone along with LH (lutenizing hormone that is also secreted from anterior) that matures the ova and matures the sperm (called ISCH in men). Growth hormone is also secrted from Anterior pit and is responsible for growth. And finally Prolactin which is responsible for breast development (tanner stage 2) and in breast milk production (lactation).
The only hormones secreted from the smaller (posterior) part of the pituitary are ADH (antidiuretic hormone) and Oxytocin which is responsible for milk letdown and uterine contractions (a positive feedback cycle).
What hormones are produced by the thyroid gland?
Thyroxine, Triiodothyronine, and Calcitonin. Thyroxine is the most abundant and both effect metabolic rate, caloric requirements, zO2 consumption, carb and libpi metab, growth and ev. brain and nervous system. Hyperthyroidism: graves disease, bulging eyes, lost weight, jittery; Hypothyroidism: goiter, no energy , lethargic, gain weight. Calcitonin is produced by the parafollicular cells of the thyroid gland that inhibits bone resorption of calcium back into the blood, so that calcium will be stored in th bone, and it also lowers existing blood calcium by allowing it to be excreted out of the kidneys. It counters action of PTH or parathormone (from the parathyroid gland, which pulls calcium out of the bone and intestines, kidneys in order to get calcium back into the blood.
What hormones come from the adrenal gland?
In the adrenal cortex: aldosterone, cortisol, and adrenal androgens; The medulla: CATECHOLAMINES: also considered neurotransmitters, epinephrine, norepinephrine, and dopamine. Sent out in response to stress.
Remember Oral Insulin....
Can only be given to Type 2 Diabetes Mellitis.