IP 11 The Nervous System II: Ion Channels

Could you update us with the ones you figured out? For the first question, here's what I got:


Directly

1. ACh
2. Glutamate
3. GABA
4. Glycine

The Nervous System II: Ion Channels
1.   List four neurotransmitters that bind to ion channels, these neurotransmitters
   are called ___________________________-acting neurotransmitters.
a.
b.
c.
d.
2.   a. The binding of ACh opens ion channels in the dendrites or cell body that
   permits both _SODIUM______ and _POTASSIUM___________ to move through them.
b. Which ion would move into the cell? _SODIUM_____________ out of the cell?
_POTASSIUM_____________
c. Which ion has the greatest electrochemical gradient? ___SODIUM___________
d. The net movement of these two ions would do what to the cell?
_DEPOLARIZE________________
e. This would be called an __EXCITATORY_________________ __________
postsynaptic potential, or _EPSP___________________.
3.   a. An inhibitory postsynaptic potential (IPSP) causes a neuron to
___________________.
b. An example of a neurotransmitter that causes an IPSP is ______________.
c. What type of ions move into the cell in response to this neurotransmitter?
______________.
4.   a. Norepinephrine binds to a receptor that is separate from the ion channel.
   This is known as a/an _____________________________ _ - acting
neurotransmitter.
b. Norepinephrine is known as the ___________________________ messenger.
c. The receptor is coupled to the ion channel by a ___________________.
5.   a. This activates an enzyme which induces the production of a
_SECOND____________ messenger.
b. An intracellular enzyme is activated and _____PHOSPHORYLATES__________ _____ the ion channel.
c. As a result of this sequence of events, what channels are closed?
__POTASSIUM ION CHANNEL__________________
d. What does this do to the neuron? _______INHIBIT_______________ ________
6.   Name three neurotransmitters that can only act indirectly.
a.
b.
c.
7.   Which of the four neurotransmitters mentioned in question 1 can also act indirectly?
a.
b.
c.
8.   Which one of the four neurotransmitters mentioned in question 1 can
   only act directly? ______________________

Post Merge: 11 years ago

Alright, didn't get any help but I finally finished and this link was very helpful. Hope it helps someone else!! =)

http://www.winona.edu/biology/adam_ip/misc/assignmentfiles/nervousii/ion_channels.pdf