Chapter 26, Animal Neurons and Signal Transduction Video Solutions, Must Know High School Biology

Problem 1

Choose the correct answer from each of the following pairs: A resting neuron has a higher concentration of $\mathbf{K}+/ \mathbf{N a}+$ on the inside of the cell and a higher concentration of $\mathbf{K}+/ \mathbf{N a}+$ on the outside of the cell. The net charge on the inside of the cell is positive/negative.

Rikhil Makwana

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02:31

Problem 2

A neuron transmits a signal by generating an , which is a wave of charge generated when ions rush into the cell.

Ummatul Choudary

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01:11

Problem 3

Put the following events of a signal crossing a synapse in the correct order:
a. Neurotransmitter binds to the postsynaptic cell's membrane
b. Calcium channels open
c. Neurotransmitter is dumped into the synapse
d. Vesicles containing neurotransmitter fuse to the presynaptic neuron's membrane
e. Action potential hits the end of the neuron
f. Sodium channels on postsynaptic cell open

Aadit Sharma

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00:35

Problem 4

Explain how a resting neuron maintains a net negative charge on the inside of the cell.

Sam Limsuwannarot

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01:07

Problem 5

Put the following events of a neuron firing in the correct order (this is a general overview of the process; not all the steps are included in this list):
a. $\mathrm{K}^{+}$channels open
b. Sodium ions diffuse into the cell
c. Sodium-potassium pumps move ions into their starting positions
d. The positive charge inside the neuron causes adjacent sodium channels to open
e. Potassium ions diffuse out of the cell
f. $\mathrm{Na}^{+}$channels open
g. A neuron receives a signal to fire and send a message

Aadit Sharma

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00:30

Problem 6

When an action potential reaches the end of the neuron, it must rely on the chemicals called
the (the ). O

Joanna Quigley

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