13.1 The Spinal Cord

1			This spinal cord tract carries information about position and movement of the lower extremities to the brain.
			A)	tectospinal
			B)	cuneate fasciculus
			C)	spinothalamic
			D)	gracile fasciculus
			E)	ventral corticospinal
2			During childbirth, some women receive anesthetics injected into which of the following spaces to block pain signals from the pelvic region?
			A)	epidural space
			B)	subdural space
			C)	fourth ventricle
			D)	central canal
3			Which of the following tracts carries sensory information from temperature receptors?
			A)	spinothalamic tract
			B)	dorsal spinocerebellar tract
			C)	cuneate fasciculus
			D)	gracile fasciculus
4			Which of the following tracts conveys motor signals to limb muscles maintaining balance?
			A)	vestibulospinal tract
			B)	tectospinal tract
			C)	corticospinal tract
			D)	reticulospinal tract
5			This area of the meninges has many smaller blood vessels and closely adheres to the outer surface of the central nervous system.
			A)	dura mater
			B)	subdural space
			C)	arachnoid membrane
			D)	subarachnoid space
			E)	pia mater
6			The ___ tracts carry sensory signals from the limb and trunk muscles to the cerebellum.
			A)	gracile fasciculus
			B)	cuneate fasciculus
			C)	spinothalamic
			D)	spinocerebellar
			E)	vestibulospinal
7			Sensory neurons enter the spinal nerve cord at the
			A)	anterior root.
			B)	ventral root.
			C)	gray commissure.
			D)	lateral horns.
			E)	anterior median fissure.

13.2 The Spinal Nerves

8			This plexus has a motor branch that controls the diaphragm.
			A)	coccygeal
			B)	sacral
			C)	lumbar
			D)	brachial
			E)	cervical
9			This plexus has sensory fibers coming from the genitalia and motor fibers that control the quadriceps muscles.
			A)	coccygeal
			B)	sacral
			C)	lumbar
			D)	brachial
			E)	cervical
10			The nerves that supply the upper limbs emerge from the spinal cord at the ___________level.
			A)	medullary cone
			B)	cervical
			C)	thoracic
			D)	ventral
			E)	lumbar
11			Which branch of each spinal nerve gives rise to the nerves of the extremities?
			A)	posterior ramus
			B)	posterior root
			C)	anterior ramus
			D)	anterior root
12			This type of fiber innervates skin, skeletal muscles, bones, and joints.
			A)	somatic fiber
			B)	general fiber
			C)	special fiber
			D)	afferent fiber
13			The ansa cervicalis nerve is a nerve of which plexus?
			A)	cervical
			B)	thoracic
			C)	sacral
			D)	lumbar
14			The brachial plexus innervates
			A)	arms and shoulders.
			B)	only the arm, but the whole arm.
			C)	the upper arm only.
			D)	the lower arm only.
15			The sciatic nerve, which runs along the posterior surface of the body, exits the spinal cord as part of which plexus?
			A)	lumbar
			B)	sacral
			C)	cervical
			D)	coccygeal
16			Which of the following nerves is not mixed?
			A)	iliohypogastric nerve
			B)	tibial nerve
			C)	axillary nerve
			D)	great auricular nerve

13.3 Somatic Reflexes

17			Extrafusal fibers are innervated by
			A)	alpha motor neurons.
			B)	gamma motor neurons.
			C)	secondary afferent fibers.
			D)	primary afferent fibers.
18			Which of these could trigger the Golgi tendon reflex?
			A)	excessive stretching of a muscle or tendon
			B)	when some parts of a muscle contract more than others
			C)	when a muscle become flaccid due to spinal shock
			D)	All of the above can trigger this reflex.
			E)	Only A and B can trigger this reflex.
19			The portions of the reflex arc in conduction sequence are
			A)	receptor > efferent nerve > interneuron > afferent nerve > muscle.
			B)	receptor > afferent nerve > interneuron > efferent nerve > muscle.
			C)	receptor > interneuron > efferent nerve > afferent nerve > muscle.
			D)	muscle > efferent nerve > interneuron > afferent nerve > receptor.
			E)	muscle > afferent nerve > interneuron > efferent nerve > receptor.
20			When the patellar reflex is elicited, the quadriceps muscles contract, but the hamstrings, their antagonists, relax. This relaxation is called
			A)	reciprocal inhibition.
			B)	polysynaptic.
			C)	crossed extension.
			D)	flexor withdrawal.
			E)	extrafusal inhibition.