Nervous system & Sleep

Which of the following best describes the function of the myelin sheath in neurons?

• It slows down neural impulses.

• It generates action potentials.

• It speeds up neural impulses.

• It blocks neurotransmitter release.

In the context of neural transmission, what does the "all-or-none response" refer to?

• The varying strength of a neuron's reaction depending on the stimulus intensity.

• A neuron's reaction of either firing fully or not firing at all.

• The process of depolarization and repolarization.

• The release and reuptake of neurotransmitters.

Why does the parasympathetic nervous system take over after eating a meal?

• To increase heart rate and dilate pupils.

• To prepare the body for fight-or-flight.

• To stimulate digestion and slow down the heart rate.

• To enhance sensory perception.

What is the function of the hippocampus in the limbic system?

• Regulation of body temperature and hunger

• Coordination of voluntary movements and balance

• Acquisition of episodic memories

• Acquisition of conditioned memories

What does the electroencephalogram (EEG) detect and record during sleep studies?

• Hormone levels

• Blood flow patterns

• Body temperature changes

• Electrical charges associated with nerve and muscle activity

What is the role of melatonin in the circadian rhythm and sleep cycle?

• It increases the production of growth hormone.

• It promotes wakefulness during the day.

• It is released in response to artificial light, promoting sleep.

• It is produced by the pineal gland to induce sleep.

Which neurotransmitter is associated with mood regulation and is involved in diseases such as schizophrenia and Parkinson’s disease?

• Serotonin

• GABA

• Endorphins

• Dopamine

Which of the following is an example of a sensory neuron?

• Generates action potentials.

• Carries information from the CNS to muscles and glands.

• Carries incoming information from the sense receptors to the CNS.

• Connects two neurons.

What is the expected outcome of a person with a lesion in the frontal lobe?

• Altered personality and reduced inhibitions

• deficits in mathematical and spatial reasoning

• Increased heart rate and alertness

• Enhanced moral judgments

What does the activation-synthesis theory propose about dreams?

• Dreams are random neural activity without meaning.

• The brain attempts to make sense of random neural activity.

• Dreams are a psychic safety valve for unacceptable feelings.

• Dreams are primarily influenced by external stimuli.