Physiology Questions?

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miss dancer queen

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1. In which way does action potential always travel?
2. What is myelin and how does it affect the rate of an action potential?
3. Nerve impulse conduction operates via a ____ feedback system.
4, What are presynaptic and postsynaptic neurons?
5, What does serotonin do? dopamine? endorphins?
6. What does depolarization begin with?
7. What are the channels that open in response to potential?
8. What is the mV measure that an action potential reaches?
9. What part of the autonomic nervous system responds to stress?


thanks everyone!
 
1. from axons (axonates) to dendrites (dendronates).
2. covering of axons. speeds up action potential, as the the impulse jumps from one node of ranveer to the other.
4. neurons that are seen before a synapse- presynaptic, and after a synapse- post synaptic
5. they are neurotransmitters, and helps the transmission of impulse across the synapse.
thats all that i can recollect. i would like to give a little advice, that its always better to learn from ur books than asking some other's help, because in doing so, u will remember the lessons all thru ur life, and would make u shine in ur career, and work without stress.
 
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