Question 1

Which of the following best describes the role of sensory (afferent) neurons in the nervous system?

Accepted Answer

They transmit information about stimuli such as temperature and pressure from receptors to the CNS.

Question 2

A patient with Guillain-Barré syndrome is unable to move muscles or feel sensations. Which type of neuron is most likely affected?

Accepted Answer

Somatic motor and sensory neurons in the peripheral nervous system

Question 3

Which structural type of neuron is most commonly found in peripheral sensory pathways, such as those extending to the limbs?

Accepted Answer

Pseudounipolar neuron

Question 4

The autonomic division of the nervous system is also known as the visceral nervous system because it primarily controls:

Accepted Answer

Contraction and secretion in internal organs

Question 5

Which of the following best explains antagonistic control in the autonomic nervous system?

Accepted Answer

Sympathetic and parasympathetic divisions exert opposite effects on the same target organ.

Question 6

Which neuron type is most likely to be found entirely within the CNS and is responsible for complex processing and communication between other neurons?

Accepted Answer

Interneuron

Question 7

A researcher is studying neurons with a single axon and a single dendrite coming off the cell body. Which type of neuron is being observed?

Accepted Answer

Bipolar neuron

Question 8

Which of the following is TRUE regarding the enteric nervous system?

Accepted Answer

It is a network of neurons in the walls of the digestive tract that can function independently of the CNS.

Question 9

Which of the following best describes the difference between axons and dendrites?

Accepted Answer

Dendrites receive incoming signals; axons carry outgoing information.

Question 10

A neuron with no identifiable axon but numerous branched dendrites is classified as:

Accepted Answer

Anaxonic neuron

Question 11

Which of the following statements about the CNS is correct?

Accepted Answer

The CNS can initiate activity without sensory input, such as voluntary movement.

Question 12

Which of the following is a correct functional classification of neurons?

Accepted Answer

Sensory (afferent), interneurons, and efferent (somatic motor and autonomic) neurons

Question 13

Which of the following best describes the function of glial cells in the nervous system?

Accepted Answer

They support neurons and maintain the environment necessary for neuronal function.

Question 14

Which of the following is a feature of efferent neurons?

Accepted Answer

They have enlarged endings called axon terminals that store and release neurotransmitters.

Question 15

A patient is experiencing abnormal contraction of smooth muscle in the digestive tract. Which division of the nervous system is most likely involved?

Accepted Answer

Autonomic division

Question 16

Which of the following correctly matches the neuron type with its primary function?

Accepted Answer

Somatic motor neuron: controls skeletal muscle contraction

Question 17

Which of the following is TRUE regarding the anatomical organization of the autonomic nervous system?

Accepted Answer

It is divided into sympathetic and parasympathetic branches, which use different chemicals to communicate with target cells.

Question 18

If a neuron has several axon branches called collaterals, what is the likely function of this neuron?

Accepted Answer

Distributing output signals to multiple target cells

Question 19

Which equation best represents the pathway of information flow in a simple neural reflex arc?

Accepted Answer

$$	ext{Sensory receptor} ightarrow 	ext{Sensory neuron} ightarrow 	ext{CNS} ightarrow 	ext{Efferent neuron} ightarrow 	ext{Effector}$$

Question 20

A medical student is asked to organize the following terms: afferent, efferent, sensory, somatic motor, autonomic, sympathetic, parasympathetic, enteric, central, peripheral, brain, spinal. Which of the following is the correct hierarchical relationship?

Accepted Answer

$$	ext{Central (brain, spinal)}$$ and $$	ext{Peripheral (afferent, efferent)}$$; $$	ext{Efferent} ightarrow 	ext{Somatic motor, Autonomic (Sympathetic, Parasympathetic)}$$; $$	ext{Peripheral} ightarrow 	ext{Enteric}$$

Neurons and Organization of the Nervous System

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