Question

9)___ is an area of skin that a single nerve innervates
reflex
myotome
dermatome
10)___ the group of muscles that a single spinal nerve root innervates
reflex
myotome
dermatome

Explanation:

Question 9

To solve this, we analyze each option:

• Reflex: A reflex is an involuntary response to a stimulus, not related to skin innervation by a nerve.
• Myotome: A myotome is a group of muscles innervated by a single spinal nerve root, not skin.
• Dermatome: By definition, a dermatome is an area of skin innervated by a single nerve. This matches the description.

Analyzing the options:

• Reflex: A reflex is a response, not a group of muscles.
• Myotome: A myotome is defined as the group of muscles innervated by a single spinal nerve root, which matches the description.
• Dermatome: A dermatome is related to skin, not muscles.

Answer:

C. Dermatome

Question 10