A&PII Ch. 13

The obturator and femoral nerves branch from this plexus

lumbar plexus

Which nerve is compressed in carpal tunnel syndrome?

median

Facial

motor and sensory

Glossopharyngeal

motor and sensory

Trigeminal

motor and sensory

Vagus

motor and sensory

Hypoglossal

motor only

Improper administration of an injection to the buttocks may injure a nerve of this plexus

sacral plexus

Olfactory

sensory only

Prevents muscle overstretching and maintains muscle tone

stretch

Has major sensory nerves of the face

Trigeminal

Controls movement of superior oblique muscle

Trochlear

Helps to regulate blood pressure and digestion.

Vagus

Serves the senses of audition and equilibrium

Vestibulocochlear

Which of the following cranial nerves has its neuron cell body located in a site other than the cranial sensory ganglia?

cranial nerve II

The back is innervated by the

dorsal rami of spinal nerves

Which of the following is (are) mixed nerves?

dorsal ramus

In a crossed-extensor reflex, if the right arm was grabbed it would flex and the left arm would ________.

extend

Pressure, pain, and temperature receptors in the skin are ________.

exteroceptors

Allows you to smile

facial

Tests both upper and lower motor pathways by stimulating the sole of the foot with a dull instrument extension

plantar

What level controls intermediate relay for incoming and outgoing neurons?

projection level

Produces a rapid withdrawal of the body part from a painful stimulus; ipsilateral

flexor

Inborn or intrinsic reflexes are ________.

involuntary, yet may be modified by learned behavior

Receptors located in epithelium of the nasal cavity

Olfactory

Forms a cross pattern called a chiasma

Optic

Which of the following cranial nerves is purely sensory?

Optic

Formed by the union of a cranial and a spinal root

Accessory

Examine the cross section through the lumbar section of the spinal cord and the two patellar reflex pathways shown. What identifies these synapses?

Afferent impulses synapse with motor neurons and interneurons Pathways will activate one muscle and simultaneously inhibit its antagonist muscle

Examine and characterize the two motor pathways in the stretch patellar reflex

Alpha motor neurons send efferent messages to the quadriceps, while parallel efferent messages to the hamstrings are reduced

Which of the following is a sensory receptor that is stimulated by light touch?

Meissner's corpuscles

Which of the following receptors is considered a free dendritic ending?

Merkel's discs

Feeling a gentle caress on your arm would likely involve all of the following except ________

Pacinian corpuscles

Which sensory receptor only senses the initial stimulus of deep pressure?

Pacinian corpuscles

Causes lens shape changes during visual accommodation

Oculomotor

Which is the true statement about the synapses in the spinal cord in the stretch reflex?

Interneurons make inhibitory synapses with neurons that prevent contraction of the antagonist muscle.

A fracture of the ethmoid bone could result in damage to which cranial nerve?

Olfactory

Which of the following branches of a spinal nerve contain autonomic motor nerve fibers and is only found in the thoracic region?

Rami communicantes

After axonal injury, regeneration in peripheral nerves is guided by ________.

Schwann Cells

All processing at the circuit level going up to the perceptual level must synapse in the ________.

Thalamus

A patient sustains a ventral horn injury to the lumbar region of the spine. This injury has damaged the cell bodies of several afferent nerves within the region. Predict how the patient's patellar reflex might be affected

The patient's patellar reflex would be absent or weak

The phrenic nerve branches from this plexus.

cervical plexus

Select the true statements (more than one) about the characteristics of sensory neurons in the stretch reflex

When a stretch activates the muscle spindle, these sensory neurons transmit impulses at a higher frequency These sensory neurons transmit afferent impulses toward the spinal cord (CNS)

If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?

a complete loss of voluntary movement

Checks the integrity of the spinal cord and dorsal rami at the level of T8 to T12

abdominal

Turns the eyeball laterally

abducens

Striking the funny bone may cause injury to a nerve of this plexus

brachial plexus

Trauma to a nerve of this plexus may cause wristdrop

brachial plexus

Striking the "funny bone" is actually stimulation of (or injury) to. the ________.

ulnar nerve

Problems in balance may follow trauma to which nerve?

vestibulocochlear