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A&p ch 18 C
| Question | Answer |
|---|---|
| What does ADH do | stimulates water reabsorption by distal & collecting tubules of kidneys |
| What does ADH do in large pharmacological doeses | stimulates smooth muscle of blood vessels |
| What does a lack of ADH result in | Diabetes. Insipidus{polyurea cant retain water} |
| ADH is produced by | Hypothalmus |
| Where is oxytocin(OT) produced | posterior pituarary gland |
| oxycotin is synthesized by | neurons in paraventricular nucleus of hypothalmus |
| Oxycotin does what?? | it stimulates the contractions of pregnant uterus & release of milk by lactating breast |
| What happens to ADH, if it has an increased extracellular fluid osmotic pressure | decreased ADH secretion |
| A decreased ECF(extra cellular fliud) leads to what | increased ADH secretion |
| What does stress lead to | to an increase ADH secretion |
| what does stimulation of nipples by infant lead to | increased oxycotin secretion, stretch receptors in cervix send impulses to hypothalamus during delivery |
| where are the thyroid glands located | in the neck, below layrnx |
| what are the 2 lateral lobes connected by | isthmus |
| The thyroid glands contains microscopic spherical sacs called | thyroid follicles |
| how do follicular cells manufacture thyroid hormones | by attaching iodine to the amino acid thyrosine |
| what produces calcitonin(CT) | parafollicular or C cells |
| thyroid horomone(throxine-T) does what | stimulate rate of oxygen consumption(metabolic rate of cells),regulates physical & mental development, development of sexual maturity |
| Calictonin is produced by what gland | thyroid gland |
| Calictonin does what to the blood calcium concentrations | decreases |
| hypothyrodism in adult of the thyroid gland is | myxedemia(dry skin) |
| what is another name for hypothyrodism in infant of thyroid gland is | cretinism |
| A lack of iodines can lead | to a simple goiter |
| where are the parathryoid glands located | attached to the posterior surface of thyroid glands |
| parathyroids are | small round bodies usually 4 or 5 in # |
| parathyroid glands contain | principal(chief) cells |
| what do the principal chief cells produce | parathyroid hormone(parathormone) |
| how does parathyroid hormone increases blood calcium | bone breakdown which releases calcium & phosphate into blood from bone, acclerating calcium absorption from kidneys tubules |
| parathyroid glands to act on kidneys to form?? | Calictriol |
| Calictriol is an active form of | Vitamin D |
| vitamin D acts on intestine to do what? | to increase absorption of calcium, phosphate, & magnesium |
| what are the effects of hypersecertion on parathyroid gland | decrease in bone mass with replacement by fibrous tissue; more easily fractured |
| what are the effects of hyposecretion on parathyroid gland | produces hypocalcemia leading to muscle twitches, spasms, & convulsions(called tetany) may lead to death in few hours |
Created by:
toluwani
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