The Nervous System Quiz

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This quiz covers topics on the Nervous System.

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Question 1

Which type of neuron serves as a connection between a sensory input and a motor output?

	interneurons
	peripheral neurons Hint: These are neurons found outside the brain and spinal cord. Come on, try another guess.
	lateral neurons Hint: Not exactly what we’re looking for. I know you can do better :)
	intraneurons Hint: No, but you almost got it... Change the prefix and you’ll get it right.

Question 1 Explanation:

Perfect! Interneuron is a type of neuron that you can find within the brain and spinal cord. Aside from processing signals, they also serve as a communication between sensory input and motor output. You can watch this video to learn more about these types of neurons.

Question 2

Which type of neurons send signals away from the CNS and to the other parts of the body?

	motor neurons
	interneurons Hint: I know you can do better than that. Interneurons are responsible for processing the signals in the CNS.
	sensory neurons Hint: Sensory neurons sends signal to the CNS, not away from it. Try another one.
	peripheral neurons Hint: Maybe, but we need a more specific answer than this one. You’re getting close.

Question 2 Explanation:

Exactly! Among the three types of neurons, motor neurons are responsible for sending the signals away from the CNS to the muscles, organs, and to the different parts of the body. For more on this topic,you can watch the video here.

Question 3

Which part of the nervous system does a lot of signal processing in the body?

	Central Nervous System
	Peripheral Nervous System Hint: Think of the other part of the nervous system. The PNS is made up of many nerves that allows communication between the brain and spinal cord and all the other parts of the body.
	Intermediary Nervous System Hint: What is this? I know you can do better than this.
	Intermediate Nervous System Hint: Um, not close enough. Think of something in the middle of everything else.

Question 3 Explanation:

You got it right! The central nervous system or CNS consists of the brain and spinal cord that houses the interneurons. These neurons are responsible for processing signals which will be sent out to the different parts of the body. For more details, you can watch the video here.

Question 4

After signals are processed in the nervous system, which part of the system is responsible for sending these processed signals to the different parts of the body?

	Peripheral Nervous System
	Central Nervous System Hint: The CNS processes the signals.
	Motor neurons Hint: Quite right but, we are talking about the PART of a system, not about the type of neuron.
	Intermediate Nervous System Hint: Oh, I know you can get it right. Think of something “located on the edges.”

Question 4 Explanation:

Oh, you are good! The peripheral nervous system consists of several nerves sending signals from the brain and spinal cord to the different types of the body. For more on the overview of the nervous system, you can watch this video.

Question 5

These ion channels in a membrane of a neuron allows selective passage for ions without using energy?

	passive/leakage ion channels
	Na+/K+ pump Hint: Na+/K+ pump pumps 3 NA+ out of the cell and 2 K+ into the cell. Try again.
	Voltage-gated ion channel Hint: Voltage-gated ion channels require a change in membrane potential for ions to pass through the membrane (that takes energy). Think a little bit harder.
	Ligand-gated ion channel Hint: Ligand-gated ion channel requires a ligand to bind to the channel to allow ions to pass through the membrane. Think of the opposite of “active.”

Question 5 Explanation:

Great! These ion channels do not take in energy for ions to come in or out of the cell. As the name suggests, it allows ions to passively and selectively cross the membrane. More of this can be seen in this video.

Question 6

For every three sodium ions that is pumped out of the cell, how many potassium ions are pumped into the cell by the Na+/K+ pump?

	Two
	One Hint: No, think “more.”
	Three Hint: Try less.
	None Hint: Oh, I know you didn’t mean that. Go ahead and try again.

Question 6 Explanation:

Exactly! Na+/K+ pump takes in energy to pump 3 Na+ ions out of the cell and 2 K+ ions into the cell causing a concentration gradient with more sodium ions outside the cell and more potassium ions inside the cell. For more on this topic, you can review the video here.

Question 7

Among the following ion channels, which can be found ONLY in the input regions of a neuron?

	ligand-gated ion channels
	Na+/K+ pump Hint: The Na+/K+ pump can be found all throughout the neuron. Try again.
	Voltage-gated ion channel Hint: Voltage-gated ion channels can be found along axons and axon terminals. Think a little bit harder.
	Passive/leakage ion channels Hint: Aside from Na+/K+ pumps, passive/leakage ion channels can also be found all throughout the neurons.

Question 7 Explanation:

Perfect! These channels require a specific molecule or ligand to bind to the membrane of the ion channels which will trigger ions to pass through the cell membrane. To learn more about the different ion channels, you can watch this video.

Question 8

What makes a neuron unique from all the other types of cells?

	They can send signals throughout the body and do them very rapidly.
	They can grow very rapidly. Hint: Try again.
	They can regenerate. Hint: No, they can’t.
	They have the ability to stand on its own. Hint: No. Pick another guess :)

Question 8 Explanation:

That’s right! Neurons are special cells that forms the basic unit of the nervous system capable of processing and sending signals throughout the body. For more on neurons, its parts and its types, you can watch and review this video.

Question 9

This part of the neuron resembles most other cells and is where most processes occur in the cell.

	soma
	dendrites Hint: Dendrite is the point from where a cell receive inputs from other cells. Think of where the input goes after passing through the dendrite.
	axon Hint: Axon is where the impulse actually originates so that it can be sent all the way down to the axon terminals. Before the signal reaches the axon, where does it go first?
	axonal terminal Hint: The axon terminal are the points where it connects with other neurons sends signals by releasing neurotransmitters. Think harder, you can do it.

Question 9 Explanation:

Excellent! The neuron has four main parts with the soma being the body of the neuron containing its nucleus. The signal is processed inside the soma of a neuron. More about parts of a neuron are discussed in this video.

Question 10

If the central nervous system consists of the brain and spinal cord, the peripheral nervous system consists of?

	nerves
	senses Hint: No, these are not part of the nervous system.
	hairs Hint: No, definitely not.
	eyes Hint: The answer is really obvious. Think again :)

Question 10 Explanation:

No sweat, right? Nerves are responsible for processing and sending the signals throughout the different parts of the body. More on this can be reviewed here.

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The Nervous System Quiz

The Nervous System Quiz

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