Negative and Positive Effects on Stimulus

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Author:
Anonymous
ID:
61690
Filename:
Negative and Positive Effects on Stimulus
Updated:
2011-01-24 17:12:16
Tags:
stimulus negative feedback positive
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Description:
The results of the response then feed back to effect the stimulus, either reducing it (negative feedback) or enhancing it (positive feedback)
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  1. Negative Feedback Mechanisms:
    Effector acts to ______ the initial stimulus
    reduce/ reverse
  2. Ex. Blood Sugar
    eat 4 donuts -> blood sugar ____ ->
    ____ released ->
    blood sugar ______ as well as the _____ level
    • goes up
    • insulin
    • goes down
    • insulin
  3. Ex. Blood Pressure
    Blood Pressure low -> anti diuretic hormone increases -> go to the bathroom less -> retain water-> blood level goes up -> blood pressure goes up -> ADH goes up
  4. Most homeostatic control mechanisms are _____ feedback mechanisms which control ______, ______, _____, _____, _____, _____
    negative

    • heart rate
    • blood pressure
    • blood oxygen levels
    • carbon dioxide levels
    • mineral levels
    • breathing rate
  5. Positive Feedback Mechanisms:
    Effector acts to ___ the initial stimulus.
    increase
  6. Ex. Blood Clotting
    tear/break in blood vessel, exposes ______ -> ______ stick to these -> they release a chemical that attracts more of them to the damaged area -> the pileup and chemical release leads to _____
    • collagen fibers
    • platelets
    • clot
  7. Ex. Birthing Process
    Baby's head pushes on the _____ -> stimulating pressure _____ -> causes brain to release ______ -> stimulates muscles of ______ to contract -> pressure on the ______ increases -> _____ levels go up -> frequencies of contractions go up, etc. -> baby is born
    • cervix
    • receptors
    • oxytocin
    • uterus
    • cervix
    • oxytocin
  8. When the body is not able to maintain homeostasis.
    Homeostatic Imbalance

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