Question 1

Which structure on a multipolar neuron is primarily responsible for receiving synaptic inputs from other neurons?

Accepted Answer

Dendrites

Question 2

In the multipolar neuron smear at 400x magnification, which labeled part is the site where action potentials are typically initiated?

Accepted Answer

Axon hillock

Question 3

If a mutation disrupts the function of neuroglia in nervous tissue, which of the following consequences is most likely?

Accepted Answer

Reduced support and protection for neurons, leading to neuronal degeneration

Question 4

Which of the following best describes the function of the nucleolus within the neuron cell body?

Accepted Answer

It synthesizes ribosomal RNA for protein production

Question 5

A researcher stains a neuron and observes a prominent axon hillock. What is the primary role of the axon hillock in neuronal function?

Accepted Answer

It integrates incoming signals and initiates action potentials

Question 6

Which equation best represents the relationship between membrane potential ($$V_m$$), intracellular ion concentration ($$[K^+]_{in}$$), and extracellular ion concentration ($$[K^+]_{out}) in a $$neuron, as described by the Nernst equation?

Accepted Answer

$$V_m = \frac{RT}{F} \ln \left( \frac{[K^+]_{in}}{[K^+]_{out}} \right)$$

Question 7

During an experiment, a toxin selectively destroys dendrites in multipolar neurons. Which of the following effects would most likely be observed?

Accepted Answer

Reduced capacity to receive and integrate synaptic inputs

Question 8

Which of the following correctly matches the structure to its function in a multipolar neuron?

Accepted Answer

Cell body – integrates incoming signals and contains the nucleus

Question 9

A patient presents with a genetic disorder affecting the nucleolus of neurons. Which cellular process is most likely to be impaired?

Accepted Answer

Protein synthesis

Question 10

Which of the following best explains why neuroglia are essential for neuron survival?

Accepted Answer

They provide metabolic and structural support, maintain homeostasis, and protect neurons from pathogens

Question 11

If the axon hillock of a neuron is damaged, which process will be most directly affected?

Accepted Answer

Initiation of action potentials

Question 12

Which of the following is the correct sequence for the flow of information in a multipolar neuron?

Accepted Answer

Dendrites → Cell body → Axon

Question 13

A histological smear of nervous tissue shows numerous small, dark-staining cells surrounding neurons. What is the most likely identity of these cells?

Accepted Answer

Neuroglia

Question 14

Which of the following would most likely result from a loss of function in the axon of a multipolar neuron?

Accepted Answer

Failure to transmit signals to target cells

Question 15

A scientist observes a neuron under 1000x magnification and notes a prominent nucleolus. What is the primary function of the nucleolus in this context?

Accepted Answer

Synthesis of ribosomal RNA

Question 16

Which of the following structures is NOT directly involved in the propagation of electrical signals in a neuron?

Accepted Answer

Neuroglia

Question 17

A patient suffers from a disease that selectively destroys neuroglia. Which of the following symptoms would you expect?

Accepted Answer

Decreased neuronal support and increased vulnerability to injury

Question 18

Which formula best describes the calculation of the resting membrane potential ($$V_{rest}) in a $$neuron, considering multiple ions?

Accepted Answer

$$V_{rest} = \frac{RT}{F} \ln \left( \frac{P_{K^+}[K^+]_{out} + P_{Na^+}[Na^+]_{out} + P_{Cl^-}[Cl^-]_{in}}{P_{K^+}[K^+]_{in} + P_{Na^+}[Na^+]_{in} + P_{Cl^-}[Cl^-]_{out}} \right)$$

Question 19

Which of the following best describes the role of the cell body in a multipolar neuron?

Accepted Answer

It integrates incoming signals and contains the nucleus and nucleolus

Practical 1: Histology Nervous Tissue powerpoint

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