Unit 4 Chapter 13 Word Scramble

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Question	Answer
The spinal cord contains ascending and descending nerve fibers that send information between the CNS and the periphery. This illustrates which function of the spinal cord?	Conduction
Where does the spinal cord arise from the medulla oblongata?	At the foramen magnum
Which are a series of fibrous connective tissue membranes covering the central nervous system?	Meninges
The matter that is composed of myelinated and unmyelinated axons and is superficial to the gray matter of the spinal cord is called ________ matter.	white
Within the spinal cord, which tracts carry information up to the brain?	Ascending
Functions of the spinal cord:	Reflexes Conduction Locomotion Neural Integration
Which viral disease results in the destruction of motor neurons?	Poliomyelitis
In an adult, the spinal cord ends at which vertebra?	L1
A nerve fiber refers to which part of a neuron?	Axon
Place the meninges in order from superficial (at the top) to deep (at the bottom).	Dura mater arachnoid mater pia mater
How many spinal nerves are there in order from superior (top) to inferior (bottom)?	8 cervical 12 thoracic 5 lumbar 5 sacral 1 coccygeal
White matter has a pearly white appearance due to the presence of which of the following? Glial cells Fibrous connective tissue Dendrites Myelin	Myelin
The anterior rami of spinal nerves form which nerve plexuses? Cervical, lumbar, sacral Thoracic, lumbar, sacral Cervical, thoracic, lumbar Cervical, thoracic, sacral	Cervical, lumbar, sacral
Within the spinal cord, which tracts carry motor signals down from the brain?	Descending
True or False: Severing a sensory nerve root will completely deaden sensation from a dermatome.	False There typically is some overlap between dermatomes, so even if a sensory root is severed, the neighboring nerve may still provide adequate sensory innervation.
The poliovirus destroys which neurons in the brainstem and anterior horn of the spinal cord?	Motor
A rapid, involuntary response to a stimulus is a(n)	Reflex
What is a nerve?	A cord of nerve fiber bundles bound together by connective tissue
Where are muscle spindles?	Embedded in muscles
How many spinal nerves are in each region of the spinal cord in order from superior to inferior?	8,12,5,5,1
A reflex arc that consists of only one synapse between two neurons is called a(n) __________ reflex arc.	Monosynaptic
Which structures contribute to nerve plexuses? Posterior ram Rami communicantes Anterior rami	Anterior rami
What effect does severing a sensory root that innervates a dermatome have?	Some sensation may remain.
What is a quick, involuntary, stereotyped response to a stimulus is called?	Reflex
Which reflex is ipsilateral?	Flexor
What is a muscle spindle?	A type of stretch receptor embedded in skeletal muscle
The crossed ________ reflex is contralateral.	Extension
In a monosynaptic synapse, how many synapses occur between the afferent and efferent neuron?	1
Which reflex occurs in response to excessive tension on a tendon?	Inhibition of the muscle
nerve plexuses of the body.	Brachial Lumbar Cervical Sacral
True or False: Severing a sensory nerve root will completely deaden sensation from a dermatome.	False
True or false: The flexor reflex uses an ipsilateral reflex arc.	True The flexion resulting from a flexor reflex occurs on the same side of the body and is ipsilateral.
Which reflex is contralateral?	Crossed extension reflex
A reflex that occurs in response to excessive tension on a tendon is called a(n) _______ reflex	Tendon
Which structures contribute to nerve plexuses?	Anterior rami
Which occurs in a flexor reflex?	Withdrawal of a limb from a harmful stimulus

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