Quiz 6 Neuro Fisio general

Question 1

Which structures is NOT considered part of the basal ganglia?

Answer 1

Cerebellum

Question 2

What describes the function of the gamma motor neurons?

Answer 2

They innervate intramural muscle fibers, adjusting the sensitivity of muscle spindles

Question 3

A lesion in the left side of the spinal cord at the thoracic level would result in:

Answer 3

Loss of pain and temperature sensation on the right side below the level of the lesion

Question 4

In the spinal cord, the cell bodies of the primary afferent neurons are located in the:

Answer 4

Dorsal root ganglia

Question 5

The corticospinal tract is involved in voluntary motor control. Its fibers primarily decussate at the:

Answer 5

Medullary pyramids

Question 6

In the context of synaptic transmission, what describes the process of neurotransmitter release?

Answer 6

An action potential arriving at the presynaptic terminal cause voltage-gated calcium channels to open, triggering neurotransmitter release into the synaptic cleft

Question 7

Which tracts is primarily responsible for transmitting fine touch and proprioceptive information to the cerebral cortex?

Answer 7

Dorsal columns

Question 8

A dynamic interfase composed of endothelial cells, astrocytes, and pericytes that selectively restricts the passage of substances from the bloodstream into the brain, describes:

Answer 8

The blood-brain barrier (BBB) and its primary function

Question 9

What is the role of myelin in the peripheral nervous system?

Answer 9

To facilitate the rapid propagation of electrical impulses along the axon through saltatory conduction

Question 10

Which neurotransmitters is primarily involved in the inhibitory pathways of the basal ganglia?

Answer 10

Gamma-aminobutyric acid