How many pairs of spinal nerves are there in the human spinal cord?

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Question 1 of 5

How many pairs of spinal nerves are there in the human spinal cord?

Correct Answer: A

Rationale: Humans have 31 pairs of spinal nerves: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal. [Level: Knowledge]

Question 2 of 5

Postganglionic neurons of the sympathetic nervous system release the neurotransmitter:

Correct Answer: B

Rationale: Sympathetic postganglionic neurons release norepinephrine (except sweat glands: ACh). [Level: Knowledge]

Question 3 of 5

The neurotransmitter deficiency most commonly associated with Alzheimer's disease is a decrease in:

Correct Answer: C

Rationale: Acetylcholine deficiency in the basal forebrain is linked to Alzheimer’s memory loss. [Level: Knowledge]

Question 4 of 5

What are the cells that support and nourish neurons?

Correct Answer: D

Rationale: Neuroglia (glial cells) support and nourish neurons. [Level: Knowledge]

Question 5 of 5

Identify the layers of the meninges in order from deepest to most superficial:

Correct Answer: C

Rationale: Meninges order: pia (deep), arachnoid, dura (superficial). [Level: Knowledge]

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