chap 10

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chap 10
2012-04-03 10:57:04
chap 10

chap 10
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  1. how do steroid and nonsteroid hormones produce their effects on target cells
    • steroid- acts on a cells dna and is fat soluble.
    • nonsteroid- uses two messangers ( first and second messanger) to produce theie effect on target cells
  2. how are hormones and prostaglandins similar but diffrent
    • similar- they both have a variety of effects on the body and produce specfic effects
    • differ- prostagland effects are only on nerby cells and are relesed into extracellular fluid
    • hormones effect all cells and are derived from cholesterol.
  3. what is negative feedback control
    a mechanism that works to maintain homeostasis by increasing hormone secretion.
  4. how does the hypothalamus control the secretions of the pituiary gland
    it regulates the pituiary gland by being a link between the brain and endrocrine system. and is a endrocrine gland.
  5. what are the functions on anterior lobe and posterior lobe hormones
    • anterior- has 6 hormones that promote cell growth, stimulate thyroid, develop sperm and eggs and stimulates milk production.
    • posterior- decrease excretion of water and stimulates contractions of the utrus for child birth.
  6. what is the function of the thyroxine
    increases the metabolic rate, promote protien synthesis and enhance neuron function.
  7. how is the level of blood calcium regulated
    the thyroid gland produces a hormone called calcitonin that stimulates calcium deposition by osteoblast in bones.
  8. how do secretions of the adrenal medulla prepare the body to recact in emergencies
    increases heart rate, cardiac output, bloodpressure, and metabolic rate. and increases blood sugar
  9. how does the adrenal cortex help maintain blood pressure
    secretes aldosterone which keeps blood pressure in check
  10. how does the pancreas regulate the level of blood glucose
    pancreas produces insulin which allows the body to uses its glucose those whos pancreas dont produce insulin or not enough develop diabetes