Question 1

Which of the following best describes neural plasticity?

Accepted Answer

The restructuring of brain networks in response to sensory input and experience.

Question 2

Affective behaviors are most closely associated with which of the following?

Accepted Answer

Feeling and emotion.

Question 3

During vertebrate evolution, the most dramatic change in the nervous system is seen in which brain region?

Accepted Answer

Forebrain (including the cerebrum)

Question 4

Which organism possesses a nervous system formed as a nerve net?

Accepted Answer

Cnidaria

Question 5

At which embryonic stage does the neural plate fuse to create the neural tube?

Accepted Answer

Day 23

Question 6

By week 6 of human nervous system development, which of the following is true?

Accepted Answer

The 7 divisions of the CNS are present, including forebrain, midbrain, and hindbrain.

Question 7

Which of the following structures is NOT part of the meninges that protect the CNS?

Accepted Answer

Choroid plexus

Question 8

Cerebrospinal fluid (CSF) is produced by which structure?

Accepted Answer

Choroid plexus in the ventricles

Question 9

Which of the following best explains the movement of water into the ventricles during CSF production?

Accepted Answer

Water follows due to osmotic gradient

Question 10

Which of the following molecules is most likely to cross the blood-brain barrier?

Accepted Answer

Small lipid-soluble molecules

Question 11

Astrocytes contribute to the blood-brain barrier by:

Accepted Answer

Promoting tight junctions between endothelial cells.

Question 12

Which of the following is a function of cerebrospinal fluid?

Accepted Answer

Providing physical and chemical protection to the brain.

Question 13

Which of the following best describes the role of the neural plate during embryonic development?

Accepted Answer

It fuses to create the neural tube, which develops into the CNS.

Question 14

Which of the following equations best represents the osmotic gradient responsible for water movement into the ventricles during CSF production?

Accepted Answer

$$\Delta \pi = RT (C_2$ - C_1$)$$

Question 15

Which of the following statements about the development of the human nervous system is correct?

Accepted Answer

By week 4, the anterior portion of the neural tube differentiates into forebrain, midbrain, and hindbrain.

Question 16

Which of the following is a real-world consequence of a compromised blood-brain barrier?

Accepted Answer

Increased risk of neurotoxicity from water-soluble compounds.

Question 17

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

Accepted Answer

They stabilize neural tissue and protect it from bruising.

Question 18

Which of the following is true regarding the flow of cerebrospinal fluid?

Accepted Answer

It flows from the ventricles to the subarachnoid space and returns to plasma by villi.

Question 19

Which of the following best explains why the brain requires a constant supply of oxygen and glucose?

Accepted Answer

Neurons have high metabolic activity and limited energy storage.

Question 20

Which of the following is a correct sequence of events in the early development of the human nervous system?

Accepted Answer

Neural plate forms → neural tube fuses → anterior portion differentiates into forebrain, midbrain, hindbrain

Central Nervous System: Structure, Development, and Protection

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