BIOS 252 Exam 2 | Questions with 100% Verified Answers
| Latest Update 2026/2027
Question: How many pairs of spinal nerves are there?
Answer: 31 pairs
Question: How many pairs of cervical nerves are there?
Answer: 8 pairs
Question: How many pairs of thoracic nerves are there?
Answer: 12 pairs
Question: How many pairs of lumbar nerves are there?
Answer: 5 pairs
Question: How many pairs of sacral nerves are there?
Answer: 5 pairs
Question: How many pairs of coccygeal nerves are there?
Answer: 1 pair
Question: What are the 5 divisions of spinal nerves?
Answer: cervical, thoracic, lumbar, sacral, coccygeal
Question: What type of neuron is the dorsal root?
Answer: Sensory (afferent)
Question: What type of neuron is the ventral root?
Answer: Motor (efferent)
Question: Do spinal nerves contain sensory or motor neurons?
Answer: Both
Question: What are myotomes?
Answer: specific muscle groups innervated by specific levels of spinal nerves
Question: What are dermatomes?
Answer: specific patches of skin innervated by specific levels of the spinal column
, Question: What is the endoneurium?
Answer: connective tissue surrounding each individual axon
Question: What is the perineurium?
Answer: connective tissue surrounding a bundle of axons making a nerve fascicle
Question: What is the epineurium?
Answer: connective tissue surrounding the entire nerve
Question: What areas does the cervical plexus serve?
Answer: head and neck
Question: Where is the phrenic nerve located?
Answer: C3-C5
Question: What does the phrenic nerve do?
Answer: innervates the diaphragm
Question: What is the cervical plexus made of?
Answer: roots and nerves
Question: What nerves are a part of the cervical plexus?
Answer: C1-C4
Question: What nerves make up the brachial plexus?
Answer: C5-T1
Question: What areas does the brachial plexus innervate?
Answer: upper limbs, neck, and shoulder muscles
Question: What makes up the brachial plexus?
Answer: roots, trunks, divisions, cords, branches
Question: What does the radial nerve do?
Answer: provides motor function to the arm, wrist, and hand
Question: Where is the radial nerve located?
Answer: brachial plexus
| Latest Update 2026/2027
Question: How many pairs of spinal nerves are there?
Answer: 31 pairs
Question: How many pairs of cervical nerves are there?
Answer: 8 pairs
Question: How many pairs of thoracic nerves are there?
Answer: 12 pairs
Question: How many pairs of lumbar nerves are there?
Answer: 5 pairs
Question: How many pairs of sacral nerves are there?
Answer: 5 pairs
Question: How many pairs of coccygeal nerves are there?
Answer: 1 pair
Question: What are the 5 divisions of spinal nerves?
Answer: cervical, thoracic, lumbar, sacral, coccygeal
Question: What type of neuron is the dorsal root?
Answer: Sensory (afferent)
Question: What type of neuron is the ventral root?
Answer: Motor (efferent)
Question: Do spinal nerves contain sensory or motor neurons?
Answer: Both
Question: What are myotomes?
Answer: specific muscle groups innervated by specific levels of spinal nerves
Question: What are dermatomes?
Answer: specific patches of skin innervated by specific levels of the spinal column
, Question: What is the endoneurium?
Answer: connective tissue surrounding each individual axon
Question: What is the perineurium?
Answer: connective tissue surrounding a bundle of axons making a nerve fascicle
Question: What is the epineurium?
Answer: connective tissue surrounding the entire nerve
Question: What areas does the cervical plexus serve?
Answer: head and neck
Question: Where is the phrenic nerve located?
Answer: C3-C5
Question: What does the phrenic nerve do?
Answer: innervates the diaphragm
Question: What is the cervical plexus made of?
Answer: roots and nerves
Question: What nerves are a part of the cervical plexus?
Answer: C1-C4
Question: What nerves make up the brachial plexus?
Answer: C5-T1
Question: What areas does the brachial plexus innervate?
Answer: upper limbs, neck, and shoulder muscles
Question: What makes up the brachial plexus?
Answer: roots, trunks, divisions, cords, branches
Question: What does the radial nerve do?
Answer: provides motor function to the arm, wrist, and hand
Question: Where is the radial nerve located?
Answer: brachial plexus
