BIOS252 EXAM 2 ANATOMY & PHYSIOLOGY II EXAM 2025 GUIDE GRADED A+ | CHAMBERLAIN

BIOS252 EXAM 2 STUDY SET
2025/2026 QUESTIONS WITH
ANSWERS

How many pairs of spinal nerves are there? - ANSWER 31
pairs



how many cervical nerves are there? - ANSWER 8 pairs



how many thoracic nerves are there? - ANSWER 12 pairs



how many pairs of lumbar nerves are there? - ANSWER 5
pairs



how many pairs of sacral nerves are there? - ANSWER 5
pairs



how many pairs of coccygeal nerves are there? - ANSWER 1
pair



What is the dorsal root? - ANSWER axons of sensory
neurons

,what is the ventral root? - ANSWER axons of motor neurons
( efferent)



Do spinal nerves contain both sensory and motor neurons? - ANSWER
yes



What is a myotome? - ANSWER specific muscle groups
innervated by specific levels of spinal nerves



what is a dermatome? - ANSWER specific patches of skin
innervated by specific levels of the spinal column



what is a endoneurium? - ANSWER connective tissue
surrounding each individual axon



What is the perineurium? - ANSWER connective tissue that
surrounds a bundle of axons making a nerve fascicle



What is the epineurium? - ANSWER surrounds the entire
nerve



What is the cervical plexus? - ANSWER C1-C5

, what is notable nerves? - ANSWER Phrenic Nerve (C3-C5)



brachial plexus - ANSWER C5-T1, nerves to upper limb,
neck, and shoulder muscles



lumbar plexus - ANSWER L1-L4, nerves to abdominal wall,
genitals, and lower limb



sacral and coccygeal plexus - ANSWER l5-s1, nerves to the
buttock, perineum, and lower limb notable nerves; sciatic nerve, tibial and
common fibular



what is a reflex? - ANSWER fast, involuntary and
predictable sequence of events that function as an arc



what are the 5 steps to a reflex? - ANSWER Sensory
receptor, sensory neuron, interneuron, motor neuron, effector



Ipsilateral - ANSWER same side



contralateral - ANSWER opposite side



monosynaptic - ANSWER one synapse