Question 1

Which part of a neuron is primarily responsible for receiving incoming signals from other neurons?

Accepted Answer

Dendrites

Question 2

In a longitudinal section of a myelinated peripheral nerve fiber, which cell type forms the myelin sheath?

Accepted Answer

Schwann cell (neurolemmocyte)

Question 3

Where are neuron cell bodies located in the spinal cord?

Accepted Answer

Gray matter

Question 4

Which structure is found at the junction where a motor neuron communicates with a skeletal muscle fiber?

Accepted Answer

Neuromuscular junction

Question 5

What is the primary function of Nissl bodies in the neuron cell body?

Accepted Answer

Synthesize proteins

Question 6

Which of the following best describes the location of sensory neuron cell bodies in the spinal cord?

Accepted Answer

Dorsal root ganglia

Question 7

A patient has damage to the Schwann cells in their peripheral nerves. Which of the following is most likely to be impaired?

Accepted Answer

Myelination of axons

Question 8

Which of the following is NOT a component of the neuron cell body (soma)?

Accepted Answer

Axon

Question 9

In a cross-section of a peripheral nerve, which structure surrounds the axon and provides insulation?

Accepted Answer

Myelin sheath

Question 10

Which equation best represents the relationship between conduction velocity ($$v) $$and myelination in a nerve fiber?

Accepted Answer

$$v_{myelinated} \u003e v_{unmyelinated}$$ for the same axon diameter

Question 11

Which of the following best explains why action potentials travel faster in myelinated axons compared to unmyelinated axons?

Accepted Answer

Myelin sheath allows saltatory conduction between nodes of Ranvier

Question 12

A histological slide shows a peripheral nerve fiber with gaps between segments of myelin. What are these gaps called?

Accepted Answer

Nodes of Ranvier

Question 13

Which cell type is responsible for myelinating axons in the central nervous system?

Accepted Answer

Oligodendrocyte

Question 14

If a patient has a lesion in the dorsal root ganglion, which function is most likely to be affected?

Accepted Answer

Sensory input from the periphery

Question 15

Which of the following structures is found in the gray matter of the spinal cord?

Accepted Answer

Neuron cell bodies

Question 16

A researcher is studying the effect of demyelination on nerve conduction. Which disease would be most relevant to their research?

Accepted Answer

Multiple sclerosis

Question 17

Which of the following best describes the function of the axon in a neuron?

Accepted Answer

Transmits electrical impulses away from the cell body

Question 18

In a practical lab, you are asked to identify the sensory neurons in a cross-section of the spinal cord. Where should you look?

Accepted Answer

Dorsal root ganglia

Question 19

Which of the following is a distinguishing feature of the cell body (soma) of a neuron?

Accepted Answer

Presence of Nissl bodies

Question 20

A patient presents with loss of sensation in their limbs. Which structure is most likely damaged?

Accepted Answer

Dorsal root ganglia

Nerve Tissue and Peripheral Nerve Structure: Lab Practical Review Notes

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