Question

Does all stimulation to a neuron generate an action potential? Why or Why not? What is...

  1. Does all stimulation to a neuron generate an action potential? Why or Why not?

  2. What is the gill-withdrawal circuit?

  3. After serotonin is added, why are less synaptic potentials now needed to create an action potential?

  4. What part of the neural cell does an action potential travel down? What part of a neural cell receives the signal?

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Answer #1

Ans . The action potential is an explosion of electrical activity that is created by a depolarizing current. This means that some stimulus causes the resting potential to move toward 0 mV. When the depolarization reaches about -55 mV a neuron will fire an action potential . This is the threshold.

Gill - Withdrawal circuit :- The gill and withdrawal reflex is an involuntary, defensive reflex of the sea hare Aplysia californica, a large shell - less sea snail or sea slug. This reflex causes the sea hare's delicate siphon and gill to be retracted when the animal is disturbed.

Serotonin reduce the frequency of occurence of spontaneous excitatory and inhibitory postsynaptic potentials.

Action potential travel along a neuronal axon.

The dendrites of neural cell receive signal.

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