Question 1

Which of the following is a primary function of the Autonomic Nervous System (ANS)?

Accepted Answer

Regulation of involuntary physiological processes such as heart rate, blood pressure, and digestion

Question 2

Which neurotransmitter is primarily released by the sympathetic division of the ANS during a 'fight or flight' response?

Accepted Answer

Norepinephrine

Question 3

A patient with Multiple Sclerosis experiences numbness and weakness due to damage to the myelin sheath. Which process is most directly affected?

Accepted Answer

Saltatory conduction of action potentials

Question 4

Which cranial nerve is responsible for autonomic control of heart rate and digestion?

Accepted Answer

Vagus (X)

Question 5

During an action potential, the influx of $$\mathrm{Na^+}$$ ions into the neuron results in which phase?

Accepted Answer

Depolarization

Question 6

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

Accepted Answer

Regulates the passage of substances, allowing essential molecules while keeping out harmful agents and plasma proteins

Question 7

Which of the following is NOT a function of the Central Nervous System (CNS)?

Accepted Answer

Relaying information to effector organs outside the CNS

Question 8

Which of the following statements about the energy requirements of nervous tissue is correct?

Accepted Answer

The brain requires a constant supply of oxygen and glucose due to its high metabolic rate

Question 9

Which phase of the action potential is characterized by the efflux of $$\mathrm{K^+}$$ ions out of the neuron?

Accepted Answer

Repolarization

Question 10

Which of the following is a function of the thalamus in the forebrain?

Accepted Answer

Relay station for sensory input, especially auditory signals

Question 11

Which of the following substances can easily cross the blood-brain barrier?

Accepted Answer

Water, carbon dioxide, and oxygen

Question 12

Which neurotransmitter is released by the parasympathetic division of the ANS to promote 'rest and digest' functions?

Accepted Answer

Acetylcholine

Question 13

Afferent (sensory) neurons carry information in which direction?

Accepted Answer

From sensory receptors to the CNS

Question 14

Which of the following is a direct effect of sympathetic nervous system activation?

Accepted Answer

Pupil dilation

Question 15

Which structure in the brain is responsible for supporting survival functions such as temperature regulation and hunger, especially during coma?

Accepted Answer

Hypothalamus

Question 16

Which of the following best describes saltatory conduction?

Accepted Answer

Jumping of action potentials from one node of Ranvier to the next in myelinated axons

Question 17

If cerebral perfusion is decreased and oxygen supply to the brain is interrupted, how long can brain cells continue to function before loss of consciousness occurs?

Accepted Answer

Approximately 10 seconds

Question 18

Which of the following is a major fuel source for the nervous system?

Accepted Answer

Glucose

Question 19

Which cranial nerve is responsible for facial expressions?

Accepted Answer

Facial (VII)

Question 20

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

Accepted Answer

Protect the nervous system and supply metabolic support

13 patho

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