Choose from polarizes, depolarizes, Na+, K+, Ca2+, Cl-, activated, inactivated,
ID: 168766 • Letter: C
Question
Choose from polarizes, depolarizes, Na+, K+, Ca2+, Cl-, activated, inactivated, potential. You may use an answer more than once. Note: the channels are named for the ion that they allow through.
A stimulus _________ the membrane
The __________channel (gate) opens, allowing _____ions into the cell
This channel is quickly _________________.
Then the __________channel (gate) opens, allowing _____ions out of the cell
The resting ___________________ is reestablished
In order to transmit a signal from one neuron to another a ________________ must be released across the ______________. This chemical signal is released when a _____________ channel opens triggering the fusion of vesicles with the plasma membrane to release the stored chemical signal.
Word Choices Na+, K+, Ca2+, synapse, dendrite, neurotransmitter, action potential
Explanation / Answer
Answer:
1. a. A stimulus depolarizes the membrane.
b. The Na+ channel (gate) opens, allowing Na+ ions into the cell.
c. This channel is quickly inactivated.
d. Then the K+ channel (gate) opens, allowing K+ ions out of the cell.
e. The resting potential is reestablished.
2. In order to transmit a signal from one neuron to another a neurotransmitter must be released across the synapse. This chemical signal is released when a Ca2+ channel opens triggering the fusion of vesicles with the plasma membrane to release the stored chemical signal.