Question 1

Which of the following structures is NOT part of the central nervous system (CNS)?

Accepted Answer

Peripheral nerves

Question 2

A patient presents with bacterial meningitis. Which meningeal layer is most closely associated with the cerebrospinal fluid (CSF)?

Accepted Answer

Subarachnoid space

Question 3

Which of the following best describes the function of the blood-brain barrier?

Accepted Answer

It selectively restricts passage of certain substances from the blood into the CNS.

Question 4

During a spinal reflex, which structure is responsible for integrating sensory information and initiating a response without input from the brain?

Accepted Answer

Integrating center in the spinal cord

Question 5

Which of the following correctly matches the root of the spinal cord with the type of information it carries?

Accepted Answer

Dorsal root: sensory (afferent) information

Question 6

A patient has damage to the ascending tracts of the spinal cord. Which function is most likely to be impaired?

Accepted Answer

Sensory information traveling to the brain

Question 7

Which equation best represents the relationship between neural activity and blood flow in the brain, as measured by functional imaging techniques?

Accepted Answer

$\Delta F_{blood} \propto \Delta A_{neural}$

Question 8

Which imaging technique provides the best temporal resolution for measuring neural activity?

Accepted Answer

Electroencephalography (EEG)

Question 9

A patient with damage to the basal ganglia would most likely experience which of the following symptoms?

Accepted Answer

Difficulty with planning and executing movements

Question 10

Which of the following is TRUE regarding the function of the cerebral cortex?

Accepted Answer

All sensory information passes through the thalamus before reaching the cortex.

Question 11

Which of the following best explains why MEG (magnetoencephalography) is preferred over EEG (electroencephalography) for spatial resolution?

Accepted Answer

MEG has better spatial resolution due to its ability to detect magnetic fields with millimeter precision.

Question 12

Which of the following is a primary function of the pons in the brainstem?

Accepted Answer

Regulation of sleep and breathing

Question 13

A patient with Wernicke's aphasia is most likely to have difficulty with which of the following?

Accepted Answer

Understanding spoken language

Question 14

Which of the following statements about cerebrospinal fluid (CSF) is correct?

Accepted Answer

CSF fills the subarachnoid space and cushions the brain.

Question 15

Which of the following best describes the role of the cerebellum in motor control?

Accepted Answer

Modifies and coordinates ongoing movements for precision

Question 16

If a drug cannot cross the blood-brain barrier, which of the following is the most likely consequence?

Accepted Answer

The drug will not affect the central nervous system.

Question 17

Which of the following equations correctly represents the relationship between the number of neurons and the density of neural tissue in the human brain?

Accepted Answer

$D_{neural} = \frac{N_{neurons}}{V_{brain}}$

Question 18

Which of the following is a consequence of inflammation of the meninges (meningitis)?

Accepted Answer

Disruption of cerebrospinal fluid flow and increased risk of neural damage

Question 19

Which of the following best describes the flow of sensory information in a spinal reflex arc?

Accepted Answer

Stimulus → Sensory neuron → Integrating center → Interneuron → Motor neuron → Response

Question 20

Which of the following is TRUE regarding the white matter in the spinal cord?

Accepted Answer

It consists of axons carrying information to and from the brain.

Introduction to the Central Nervous System (CNS): Structure, Protection, and Function

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