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Author Question: In order to produce a depolarization or hyperpolarization of the postsynaptic membrane, ... (Read 16 times)

sc00by25

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on: Jun 22, 2018
In order to produce a depolarization or hyperpolarization of the postsynaptic membrane, neurotransmitters
 
  a. diffuse widely in the brain to exert changes in metabolism.
  b. act through ionotropic receptors to activate a second-messenger.
  c. are released into the synapse from the cisternae.
  d. open ion channels in the postsynaptic membrane.
  e. alter ion channel activity for minutes.

Question 2

Ca++ enters the cell when an action potential is generated. Diffision and electrostatic pressures push Ca++ into the cell. Ca++ channels are
 
  a. passive.
  b. chemically-gated.
  c. voltage-gated.
  d. always open.
  e. chemically-gated and voltage-gated.


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isabelt_18

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Reply #1 on: Jun 22, 2018
Answer to Question 1

Answer: d. open ion channels in the postsynaptic membrane.

Answer to Question 2

Answer: e. chemically-gated and voltage-gated.


sc00by25

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Reply 2 on: Jun 22, 2018
Thanks for the timely response, appreciate it

recede

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Reply 3 on: Yesterday
Wow, this really help

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