Anatomy 102 Exam 2

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Author:
LizzMiller
ID:
201509
Filename:
Anatomy 102 Exam 2
Updated:
2013-02-18 16:13:41
Tags:
anatomy
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anatomy
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  1. Types of graded potentials
    • post synaptic
    • receptor
    • generator
  2. Graded Potentials
    • Small deviation from Resting Membrane Potential¬†
    • Can be hyperpolarizing or depolarizing
  3. Postsynaptic potentials
    • occurs in dendrites or soma of a neuron in response to a neurotransmitter
    • The can be excitatory (EPSP) or inhibitory (ISPS)
  4. Receptor Potentials
    occur in sensory receptors and sensory neurons
  5. generator potentials
    occur in sensory receptors and sensory neurons
  6. 4 characteristics of all graded potentials
    • 1. The transmembrane potential is most changed at site of stimulation and decreases with distance
    • 2. The effect spreads passively, due to local currents
    • 3. The properties and distribution of the membrane channels involved determine the nature of the change (hyperpolarization or depolarization)
    • 4. The stronger the stimulus, the greater is the change in potential and the larger is the area effected
  7. Graded Potentials VS Action Potentials

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