Course

Introductory Biology

Study Pack

Set 49 Nervous Systems

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Question 1

(Multiple Choice)

Free
The blood-brain barrier

A) is formed by tight junctions.
B) is formed by oligodendrocytes.
C) tightly regulates the intracellular environment of the CNS.
D) uses chemical signals to communicate with the spinal cord.
E) provides support to the brain tissue.

Answer

Question 2

(Multiple Choice)

Free
The human knee-jerk reflex requires an intact

A) spinal cord.
B) hypothalamus.
C) corpus callosum.
D) cerebellum.
E) medulla.

Answer

Question 3

(Multiple Choice)

Free
Although an exact count is not available, it is likely that the human brain has as many as

A) 10,000 neurons.
B) 500,000 neurons.
C) 1 million neurons.
D) 10 million neurons.
E) 100 billion neurons.

Answer