Question 1

Which of the following best describes the primary function of the thalamus in the central nervous system?

Accepted Answer

It is the main entry route of sensory data into the cerebral cortex, acting as a relay station for most sensory information.

Question 2

A patient presents with an inability to initiate voluntary movements and displays a shuffling gait with minimal facial expression. Which brain structure is most likely affected?

Accepted Answer

Basal nuclei, particularly due to degeneration of substantia nigra neurons

Question 3

Which of the following statements about the blood-brain barrier is correct?

Accepted Answer

It is formed by tight junctions between endothelial cells of brain capillaries, limiting passage of many substances.

Question 4

Which lobe of the cerebrum is primarily responsible for processing visual information?

Accepted Answer

Occipital lobe

Question 5

A patient with damage to Broca’s area would most likely exhibit which of the following symptoms?

Accepted Answer

Inability to produce grammatically correct speech, though comprehension remains intact

Question 6

Which of the following best explains why fever occurs during infection?

Accepted Answer

Pyrogens increase the hypothalamic set point for body temperature, triggering heat-conserving mechanisms.

Question 7

Which of the following is a function of the limbic system?

Accepted Answer

Processing and integrating memory, learning, emotion, and behavior

Question 8

Which pathway is responsible for transmitting pain and temperature sensations from the body to the brain?

Accepted Answer

Anterolateral system, including the spinothalamic tract

Question 9

Which of the following best describes the role of the cerebellum in voluntary movement?

Accepted Answer

It monitors ongoing movements, integrates sensory input, and corrects motor errors to ensure smooth, coordinated motion.

Question 10

Which of the following structures is responsible for the production and circulation of cerebrospinal fluid (CSF)?

Accepted Answer

Choroid plexuses in the ventricles

Question 11

A patient is unable to feel pain or temperature on the right side of their body after a spinal cord injury. Which tract is most likely damaged?

Accepted Answer

Left spinothalamic tract

Question 12

Which of the following best describes the function of the hypothalamus?

Accepted Answer

It regulates autonomic functions, body temperature, hunger, thirst, and links the nervous and endocrine systems.

Question 13

Which of the following is TRUE regarding the organization of gray and white matter in the brain and spinal cord?

Accepted Answer

White matter is superficial in the spinal cord but deep in the brain.

Question 14

Which of the following best explains the placebo effect in pain perception?

Accepted Answer

Placebo treatments stimulate the release of endorphins from the periaqueductal gray matter, reducing pain perception.

Question 15

Which of the following is a correct sequence for the flow of cerebrospinal fluid (CSF) through the brain?

Accepted Answer

Lateral ventricles → third ventricle → cerebral aqueduct → fourth ventricle → subarachnoid space

Question 16

Which of the following best describes the function of the corpus callosum?

Accepted Answer

It connects the right and left cerebral hemispheres, allowing communication between them.

Question 17

Which of the following is a real-world example of the integrative function of the CNS?

Accepted Answer

A person deciding to withdraw their hand after interpreting the sensation of heat and planning the movement.

Question 18

Which of the following best describes the role of the reticular formation?

Accepted Answer

It is involved in regulating respiration, blood pressure, sleep/wake cycle, pain perception, and consciousness.

Question 19

Which of the following is a function of the prefrontal cortex?

Accepted Answer

Modulating behavior, personality, learning, and memory

Question 20

Which of the following best explains why the hands and face have a larger representation in the primary somatosensory cortex (S1)?

Accepted Answer

They are involved in more complex and sensitive tasks, requiring greater sensory input and processing.

The Central Nervous System: Structure, Function, and Integration

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