Page 1 of 54
EXAM 2: BIOS252 / BIOS 252 ANATOMY &
PHYSIOLOGY II WITH LAB (LATEST 2025 UPDATES
STUDY BUNDLE WITH COMPLETE SOLUTIONS) | 100%
CORRECT | GRADE A - CHAMBERLAIN
total number of spinal nerves .....ANSWER.....31 pairs
How many cervical nerves are there? .....ANSWER.....8 (C1-C8)
How many thoracic nerves? .....ANSWER.....12 (T1-T12)
How many lumbar nerves? .....ANSWER.....5 (L1-L5)
How many sacral nerves? .....ANSWER.....5 (S1-S5)
How many coccygeal nerves? .....ANSWER.....1 (Co1)
dorsal root (posterior root) .....ANSWER.....Sensory neuron
(afferent), dorsal root ganglia (cell body)
Carry sensory information to spinal cord
ventral root (anterior) .....ANSWER.....Motor neuron (efferent)
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Carry motor signal to distant part of body
Spinal nerves contains which two neurons? .....ANSWER.....Motor
and Sensory Neurons
Myotomes .....ANSWER.....specific MUSCLE GROUPS innervated
by specific levels of spinal nerves
Dermatomes .....ANSWER.....Specific PATCHES OF SKIN
innervated by specific levels of the spinal column
Endoneurium .....ANSWER.....Connective Tissue surrounds each
individual Axon
(Stuck to Axon)
Perineurium .....ANSWER.....covers fascicles
(found in middle)
Epineurium .....ANSWER.....surrounds spinal nerve
(Found outside)
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cervical plexus .....ANSWER.....C1-C5
phrenic nerve (C3-C5) (play role with breathing)
Serves head and neck
Notable nerves
Roots and nerves
brachial plexus .....ANSWER.....C5-T1 nerves to upper limbs, neck,
& shoulder muscles
Roots,Trunks, Division,Cords, & Branches (complex arrangement)
Notable Nerves (radial, Median, & Ulnar)
What does accronym R.T.D.C.B stand for? .....ANSWER.....Roots
Trunks
Divisions
Cords
Branches
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lumbar plexus .....ANSWER.....L1-L4 (lumbar region and femoral
nerve)
Nerves to abdominal wall, genitals, and lower limb
Roots and divisions
Notable nerves, Radial, Median, and Ulnar
sacral and coccygeal plexus .....ANSWER.....L4-Co1
Nerves to the buttock, perineum and lower limb
Roots and divisions
Notable Nerves- Sciatic nerve (tibial and common fibular)
reflex .....ANSWER.....A fast, involuntary and predictable
sequence of events that function in an are
Sensory receptors, sensory neurons, interneuron, motor neuron,
effector,
Effector .....ANSWER.....The muscles that carry out response
EXAM 2: BIOS252 / BIOS 252 ANATOMY &
PHYSIOLOGY II WITH LAB (LATEST 2025 UPDATES
STUDY BUNDLE WITH COMPLETE SOLUTIONS) | 100%
CORRECT | GRADE A - CHAMBERLAIN
total number of spinal nerves .....ANSWER.....31 pairs
How many cervical nerves are there? .....ANSWER.....8 (C1-C8)
How many thoracic nerves? .....ANSWER.....12 (T1-T12)
How many lumbar nerves? .....ANSWER.....5 (L1-L5)
How many sacral nerves? .....ANSWER.....5 (S1-S5)
How many coccygeal nerves? .....ANSWER.....1 (Co1)
dorsal root (posterior root) .....ANSWER.....Sensory neuron
(afferent), dorsal root ganglia (cell body)
Carry sensory information to spinal cord
ventral root (anterior) .....ANSWER.....Motor neuron (efferent)
,Page 2 of 54
Carry motor signal to distant part of body
Spinal nerves contains which two neurons? .....ANSWER.....Motor
and Sensory Neurons
Myotomes .....ANSWER.....specific MUSCLE GROUPS innervated
by specific levels of spinal nerves
Dermatomes .....ANSWER.....Specific PATCHES OF SKIN
innervated by specific levels of the spinal column
Endoneurium .....ANSWER.....Connective Tissue surrounds each
individual Axon
(Stuck to Axon)
Perineurium .....ANSWER.....covers fascicles
(found in middle)
Epineurium .....ANSWER.....surrounds spinal nerve
(Found outside)
,Page 3 of 54
cervical plexus .....ANSWER.....C1-C5
phrenic nerve (C3-C5) (play role with breathing)
Serves head and neck
Notable nerves
Roots and nerves
brachial plexus .....ANSWER.....C5-T1 nerves to upper limbs, neck,
& shoulder muscles
Roots,Trunks, Division,Cords, & Branches (complex arrangement)
Notable Nerves (radial, Median, & Ulnar)
What does accronym R.T.D.C.B stand for? .....ANSWER.....Roots
Trunks
Divisions
Cords
Branches
, Page 4 of 54
lumbar plexus .....ANSWER.....L1-L4 (lumbar region and femoral
nerve)
Nerves to abdominal wall, genitals, and lower limb
Roots and divisions
Notable nerves, Radial, Median, and Ulnar
sacral and coccygeal plexus .....ANSWER.....L4-Co1
Nerves to the buttock, perineum and lower limb
Roots and divisions
Notable Nerves- Sciatic nerve (tibial and common fibular)
reflex .....ANSWER.....A fast, involuntary and predictable
sequence of events that function in an are
Sensory receptors, sensory neurons, interneuron, motor neuron,
effector,
Effector .....ANSWER.....The muscles that carry out response
