Question 1

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

Accepted Answer

It maintains a stable environment for the brain by selectively allowing certain substances to pass while blocking others.

Question 2

A patient suffers a stroke that damages the substantia nigra. Which of the following symptoms is most likely to develop?

Accepted Answer

Impaired voluntary motor control, similar to Parkinson’s disease

Question 3

Which of the following correctly matches the meningeal layer with its function?

Accepted Answer

Arachnoid mater – contains the largest blood vessels of the brain and CSF in the subarachnoid space

Question 4

Which of the following pathways is responsible for carrying voluntary motor commands from the CNS to skeletal muscles?

Accepted Answer

Somatic efferent pathway

Question 5

A lumbar puncture is typically performed between which vertebrae, and why is this location chosen?

Accepted Answer

Between L4 and L5, because the spinal cord ends above this level, reducing the risk of injury

Question 6

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

Accepted Answer

CSF is produced by the choroid plexus and absorbed into the dural venous sinuses via arachnoid granulations.

Question 7

Which structure acts as the main relay station for sensory information ascending to the cerebral cortex?

Accepted Answer

Thalamus

Question 8

A patient presents with loss of balance and uncoordinated movements. Which brain region is most likely affected?

Accepted Answer

Cerebellum

Question 9

Which of the following best describes the arrangement of gray and white matter in the spinal cord?

Accepted Answer

Gray matter is located centrally, surrounded by white matter.

Question 10

Which of the following is a function of the reticular activating system (RAS)?

Accepted Answer

Maintains cerebral cortical alertness and filters out repetitive stimuli

Question 11

A patient with damage to the medulla oblongata would most likely experience which of the following symptoms?

Accepted Answer

Irregular heart rate and difficulty breathing

Question 12

Which of the following best explains why the blood-brain barrier is absent in the hypothalamus?

Accepted Answer

The hypothalamus must monitor blood composition and body temperature to maintain homeostasis.

Question 13

Which of the following fiber types connects the two cerebral hemispheres?

Accepted Answer

Commissural fibers

Question 14

Which of the following is the correct order of the flow of cerebrospinal fluid (CSF) through the brain ventricles?

Accepted Answer

Lateral ventricles → interventricular foramen → third ventricle → cerebral aqueduct → fourth ventricle

Question 15

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

Accepted Answer

Chief integration center of the autonomic nervous system, regulating body temperature, hunger, thirst, and hormonal output

Question 16

A patient is unable to maintain normal rhythm and depth of breathing. Which brain region is most likely affected?

Accepted Answer

Pons

Question 17

Which of the following statements about the spinal cord is correct?

Accepted Answer

It is a major reflex center and provides two-way communication between the brain and body.

Question 18

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

Accepted Answer

Processes input from the cortex, brain stem, and sensory receptors to provide precise, coordinated movements and maintain balance

Question 19

Which of the following is a correct statement about the organization of the gray matter in the spinal cord?

Accepted Answer

Dorsal horns contain interneurons that receive somatic and visceral sensory input.

Question 20

A patient has a lesion affecting the projection fibers of the cerebrum. Which of the following functions is most likely to be impaired?

Accepted Answer

Communication between the cerebral cortex and lower brain or spinal cord

Central Nervous System: Structure, Function, and Protection

Guida di studio - Domande di pratica