BIOS 255 TEST 3 ACTUAL FINAL EXAM

BIOS 255 TEST 3 ACTUAL FINAL EXAM

WITH REAL QUESTIONS AND ANSWERS //

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Each anterior root and its corresponding posterior root unite within the _______ to become a spinal nerve. - ANSWER-intervertebral foramen

Dermatomes are clinically important because they can indicate potential damage to one or more ______. - ANSWER-spinal nerves

The principal plexuses are the plexus, plexus, plexus, and sacral plexuses - ANSWER-cervical or Cervical

Blank 2: brachial or Brachial

Blank 3: lumbar or Lumbar

One important branch of the cervical plexus is the phrenic nerve, which is formed primarily from the ______ nerve and some contributing axons from ______. - ANSWER-C4, C3 and C5

The cell bodies of ______ neurons are found in the posterior horns of the spinal cord. - ANSWER-sensory

There are five roots of anterior rami that unite to form the superior, middle, and inferior ______ in the posterior triangle of the neck. - ANSWER-trunks

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A spinal nerve contains ______ axons. - ANSWER-motor and sensory

The ______ rami of most spinal nerves form nerve plexuses on the right or left side of the body. - ANSWER-anterior

The phrenic nerve travels through the thoracic cavity to innervate the ______. - ANSWER-diaphragm

Each brachial plexus is formed by the anterior rami of spinal nerves ______. -

ANSWER-C5-T1

The left and right lumbar plexuses are formed from the ______ rami of spinal nerves L1-L4 located lateral to the L1-L4 vertebrae and along the ______ muscle in the posterior abdominal wall. - ANSWER-anterior, psoas major

The nerves emerging from a sacral plexus innervate the ______ region, pelvis, perineum, posterior thigh, and almost all of the ______. - ANSWER-gluteal, leg and foot

The sciatic nerve is actually composed of two divisions wrapped in a common sheath. What are the two divisions? - ANSWER-Tibial and common fibular

A reflex arc is the neural wiring of a ______ reflex. - ANSWER-single

The lumbar plexus is subdivided into a(n) ______ division and a ______ division. - ANSWER-anterior, posterior

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The left and right sacral plexuses are formed from the ______ rami of spinal nerves ______ and are located immediately inferior to the lumbar plexuses. - ANSWER-anterior, L4-S4

Choose the two primary functions of the nervous system. - ANSWER- interpretation control

The anterior funiculus is composed of tracts of white matter that occupy the space on each ______ side of the cord between the anterior gray horns and the anterior ______. - ANSWER-anterior, anterior median fissure

Some of the individual tracts conduct sensory impulses as ______ from the spinal cord to the brain. - ANSWER-ascending tracts

The white matter of the spinal cord is ______ to the gray matter. - ANSWER- external

The ______ horns primarily house the cell bodies of somatic motor neurons. - ANSWER-anterior

The cell bodies of ______ neurons are found in the posterior horns of the spinal cord. - ANSWER-sensory

The anterior funiculi are interconnected by the ______. - ANSWER-white commissure

The axons within each white matter funiculus are organized into smaller structural units called ______. - ANSWER-tracts

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A spinal nerve contains ______ axons. - ANSWER-motor and sensory

- ANSWER-A

matches Choice, Posterior funiculus Posterior funiculus B matches Choice, Posterior horn Posterior horn C matches Choice, Lateral funiculus Lateral funiculus D matches Choice, Anterior horn Anterior horn

Lateral horns are found in the ______ parts of the spinal cord only. - ANSWER- T1-L2

the central nervous system is made of the - ANSWER-brain and the spinal cord

The peripheral nervous system is made of the spinal nerves, ganglia, and ---- - ANSWER-cranial nerves

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