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WorksheetsNervous System Quiz
Total questions: 40
Worksheet time: 20mins
What are the three functions of the nervous system in order of how they occur?
Sensory input, integration, motor output
Motor output, sensory input, integration
Integration, motor output, sensory input
Sensory input, motor output, integration
Sense and approach injured neurons. Which glial cell?
Microglial cells
Astrocytes
Schwann cells
Ependymal cells
Surround the cell body of a neuron. Which glial cell?
Satellite cells
Astrocytes
Schwann cells
Microglial cells
Use cilia to circulate cerebrospinal fluid around the brain and spinal cord. Which glial cell?
Ependymal cells
Astrocytes
Schwann cells
Microglial cells
What are two other terms for an action potential?
Nerve impulse, message
Signal, wave
Current, flow
Charge, spark
What do we call the difference in charge on the inside of a cell versus the outside?
Membrane potential
Voltage difference
Ionic balance
Electrical gradient
What causes the difference in charge on the inside versus the outside of a cell?
Ions
Electrons
Protons
Neutrons
Which two ions are involved in membrane potential?
Na+ and K+
Ca2+ and Cl-
Mg2+ and SO4-
H+ and OH-
What is the charge inside of a cell naturally (positive or negative)? Why is it this way?
Negative due to DNA
Positive due to proteins
Neutral due to water
Positive due to lipids
What is a concentration gradient?
A difference in concentration of specific ions between the inside and outside of a cell
A balance of water molecules inside and outside the cell
A uniform distribution of ions across the cell membrane
A difference in temperature inside and outside the cell
Equilibrium is achieved thanks to voltage-gated channels. What do voltage-gated channels require to open?
An impulse
A temperature change
A pressure change
A chemical reaction
What are the two types of voltage-gated channels?
Na+ and K+
Ca2+ and Cl-
Mg2+ and SO4-
H+ and OH-
What do sodium-potassium pumps require to open?
ATP
ADP
AMP
GTP
What happens to sodium and potassium when the sodium-potassium pumps open?
3 Na+ get pumped out; 2 K+ get pumped in
2 Na+ get pumped in; 3 K+ get pumped out
3 Na+ get pumped in; 2 K+ get pumped out
2 Na+ get pumped out; 3 K+ get pumped in
Before an action potential, what is the charge inside of a neuron?
Negative
Positive
Neutral
Fluctuating
During an action potential, what happens to the charge inside of the neuron?
It flips from negative to positive
It becomes more negative
It remains neutral
It becomes more positive
Which are the 4 stages of action potential in order?
Resting potential, depolarization, repolarization, refractory period
Depolarization, resting potential, refractory period, repolarization
Refractory period, depolarization, repolarization, resting potential
Repolarization, refractory period, resting potential, depolarization
When a neuron is not sending any message, what stage is the neuron in?
Resting potential
Depolarization
Repolarization
Refractory period
During resting potential, what is the charge inside the axon?
Positive
Neutral
Negative
Zero
During resting potential, what is the charge outside the axon?
Negative
Positive
Neutral
Zero
During resting potential, which pumps/channels are open?
Sodium channels
Potassium channels
None
Calcium channels
Describe the concentration of K+ ions during resting potential.
There is more K+ on the inside versus the outside
There is more K+ on the outside versus the inside
Equal concentration inside and outside
No K+ ions present
During resting potential is there a concentration gradient of K+ ions?
No
Yes
Sometimes
Only during action potential
Describe the concentration of Na+ ions during resting potential.
There is more Na+ on the inside versus the outside
There is more Na+ on the outside versus the inside
Equal concentration inside and outside
No Na+ ions present
During resting potential is there a concentration gradient of Na+ ions?
No
Yes
Sometimes
Only during action potential
Which stage of action potential comes when an impulse arrives at the axon?
Repolarization
Depolarization
Resting potential
Hyperpolarization
What does the impulse cause during depolarization?
Causes the potassium voltage-gated channels to open
Causes the sodium voltage-gated channels to open
Causes the calcium voltage-gated channels to open
Causes no change
When the Na+ channels open during depolarization, what happens to sodium?
Sodium rushes out of the neuron
Sodium stays in place
Sodium rushes into the neuron until it reaches equilibrium
Sodium is expelled from the neuron
What does this rush in of Na+ cause?
The inside of the neuron becomes negative
The inside of the neuron becomes positive
The outside of the neuron becomes positive
No change in charge
Once Na+ rushes in and is at equilibrium (ex. 4 inside, 4 outside) is there a concentration gradient of Na+ anymore?
Yes
No
Sometimes
Only during action potential
If there is no concentration gradient, what happens to the sodium voltage-gated channels?
They open
They close
They remain unchanged
They become inactive
After depolarization, which stage of action potential comes next?
Repolarization
Depolarization
Resting potential
Hyperpolarization
What happens at the beginning of repolarization?
The sodium channels open
The potassium channels open
The calcium channels open
No channels open
When the K+ channels open, what happens to potassium?
It rushes into the axon
It rushes out of the axon
It stays in place
It is expelled from the axon
What does this rush out of K+ cause?
The axon becomes very positive
The axon becomes very negative
The axon remains unchanged
The axon becomes neutral
Once K+ rushes out and is at equilibrium (ex. 4 inside, 4 outside) is there a concentration gradient of K+ anymore?
Yes
No
Sometimes
Only during action potential
If there is no concentration gradient, what happens to the potassium voltage-gated channels?
They open
They close
They remain unchanged
They become inactive
After repolarization, is the axon back at resting potential? Why or why not?
Yes – sodium and potassium are at equilibrium
No – sodium and potassium and both at equilibrium
Yes – more sodium on the outside and more potassium on the inside
No – more sodium on the outside and more potassium on the inside
Which channel/pump needs to open to move ions even when they are at equilibrium?
Sodium channels
Potassium channels
Sodium-potassium pumps
Calcium channels
What do the sodium-potassium pumps require to open?
ATP
ADP
Calcium
Sodium
