BIOS 252 Exam 2 Anatomy & Physiology II weeks 3 & 4
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 Both
neurons?
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
2026/2027
, BIOS 252 Exam 2 Anatomy & Physiology II weeks 3 & 4
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
What nerves are a part of the cervical plexus? C1-C4
What nerves make up the brachial plexus? C5-T1
What areas does the brachial plexus innervate? upper limbs, neck, and shoulder muscles
What makes up the brachial plexus? roots, trunks, divisions, cords, branches
2026/2027
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 Both
neurons?
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
2026/2027
, BIOS 252 Exam 2 Anatomy & Physiology II weeks 3 & 4
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
What nerves are a part of the cervical plexus? C1-C4
What nerves make up the brachial plexus? C5-T1
What areas does the brachial plexus innervate? upper limbs, neck, and shoulder muscles
What makes up the brachial plexus? roots, trunks, divisions, cords, branches
2026/2027
