Question 1

Which of the following best describes the main difference between the nervous systems of cnidarians and vertebrates?

Accepted Answer

Cnidarians have a nerve net with no centralization, while vertebrates have a central nervous system with specialized regions.

Question 2

Which structure in the vertebrate nervous system is primarily responsible for the automatic control of breathing and heart rate?

Accepted Answer

Medulla oblongata

Question 3

A patient is able to understand spoken language but cannot produce speech. Damage to which area of the brain is most likely responsible?

Accepted Answer

Broca's area

Question 4

Which of the following best explains why the sympathetic and parasympathetic divisions of the autonomic nervous system have opposite effects on target organs?

Accepted Answer

They use different neurotransmitters at the postganglionic synapse.

Question 5

Which glial cell type is directly involved in forming the blood-brain barrier?

Accepted Answer

Astrocytes

Question 6

A person suffers a stroke that damages the right parietal lobe. Which of the following deficits is most likely to occur?

Accepted Answer

Difficulty recognizing spatial relationships and patterns

Question 7

Which of the following statements about long-term potentiation (LTP) is correct?

Accepted Answer

LTP involves a lasting increase in synaptic transmission strength, often requiring glutamate release and changes in postsynaptic receptors.

Question 8

Which brain structure acts as the pacemaker for circadian rhythms in mammals?

Accepted Answer

Suprachiasmatic nucleus (SCN)

Question 9

A researcher uses functional magnetic resonance imaging (fMRI) to study brain activity. What is the primary physiological change detected by this technique?

Accepted Answer

Changes in local oxygen concentration

Question 10

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

Accepted Answer

Coordinating movement and balance, and helping in learning motor skills

Question 11

Which neurotransmitter is most closely associated with the brain's reward system and is increased by addictive drugs such as cocaine and amphetamine?

Accepted Answer

Dopamine

Question 12

A patient with Parkinson’s disease is treated with L-dopa. What is the rationale for this treatment?

Accepted Answer

L-dopa is a precursor to dopamine and can increase dopamine levels in the brain.

Question 13

Which of the following is a hallmark of Alzheimer’s disease at the molecular level?

Accepted Answer

Accumulation of amyloid plaques and neurofibrillary tangles composed of tau protein

Question 14

Which of the following best explains why the left and right hemispheres of the brain can have distinct functions but still work together?

Accepted Answer

The corpus callosum connects the hemispheres, allowing communication between them.

Question 15

Which of the following is true regarding the development of the vertebrate brain?

Accepted Answer

The anterior neural tube gives rise to the forebrain, midbrain, and hindbrain.

Question 16

Which of the following best describes the process of neuronal plasticity?

Accepted Answer

The nervous system’s ability to be remodeled after birth, strengthening or weakening synaptic connections.

Question 17

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulating the body’s thermostat and central biological clock

Question 18

A person is exposed to a sudden, threatening stimulus. Which division of the autonomic nervous system is primarily activated, and what is the main neurotransmitter released by its postganglionic neurons?

Accepted Answer

Sympathetic division; norepinephrine

Question 19

Which of the following best explains why sleep is considered an active state for the brain?

Accepted Answer

During sleep, the brain consolidates memories and regulates gene expression.

Question 20

Which of the following is a correct statement about the organization of gray and white matter in the vertebrate central nervous system?

Accepted Answer

Gray matter consists of neuron cell bodies, dendrites, and unmyelinated axons, while white matter consists of bundles of myelinated axons.

The Organization and Function of the Nervous System

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