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BIOS 252 Exam 2 Questions with Verified Correct Answers

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BIOS 252 Exam 2 Questions with Verified Correct Answers

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BIOS 252 Exam 2 Questions with Verified
Correct Answers
How many pairs of spinal nerves are there?

31 pairs

How many pairs of cervical nerves are there?

8 pairs

How many pairs of thoracic nerves are there?

12 pairs

How many pairs of lumbar nerves are there?

5 pairs

How many pairs of sacral nerves are there?

5 pairs

How many pairs of coccygeal nerves are there?

1 pair

What are the 5 divisions of spinal nerves?

cervical, thoracic, lumbar, sacral, coccygeal

What type of neuron is the dorsal root?

Sensory (afferent)

What type of neuron is the ventral root?

Motor (efferent)

, Do spinal nerves contain sensory or motor neurons?

Both

What are myotomes?

specific muscle groups innervated by specific levels of spinal nerves

What are dermatomes?

specific patches of skin innervated by specific levels of the spinal column

What is the endoneurium?

connective tissue surrounding each individual axon

What is the perineurium?

connective tissue surrounding a bundle of axons making a nerve fascicle

What is the epineurium?

connective tissue surrounding the entire nerve

What areas does the cervical plexus serve?

head and neck

Where is the phrenic nerve located?

C3-C5

What does the phrenic nerve do?

innervates the diaphragm

What is the cervical plexus made of?

roots and nerves

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