Mastering A&P Chapter 13

Which of the following is NOT correct concerning nerves? a.Nerves are collection of axons of either sensory or motor neurons but not both. b.Nerves are covered by an outer sheath called the epineurium. c.Nerves are analogous to tracts in the CNS. d.Nerves do not contain cell bodies.

Which connective tissue layer directly surrounds every axon in a nerve?

Which cranial nerve innervates most of the visceral organs?

Which of the following cranial nerves carries only motor information?

The phrenic nerve is a branch from the __________.

Which of the following is NOT required for a reflex arc? a. motor neurons b. interneurons c. sensory neurons d. receptors

The sensory division of the PNS is also known as the efferent division. T/F

__________ are receptors that can respond to painful stimuli.

Some large arteries that are proximal to the heart are sensitive to the stretch of the blood vessels. This stretch indicates the blood's pressure. Which of the following pairs of classifications below best fit the receptor type that is being described above?

We can touch our finger to our nose while our eyes are closed in part because we can sense the position and movement of our joints as well as the length of stretch in our muscles. These sensations create awareness of our body's positioning. The following receptors are most likely responsible for this ability.

Transduction refers to conversion of ________.

Feeling a gentle caress on your arm would likely involve all of the following except ________. a. lamellar corpuscles b. Meissner's corpuscles c. hair follicle receptors d. tactile discs

Phasic receptors adapt quickly to a stimulus. For that reason, they are good at detecting changes instead of constantly signaling the CNS. T/F

In order for you to realize there has been a sensory change, it has to reach the __________ level of processing.

Which of the following characteristics is representative of receptor-level processing, NOT perceptual-level processing?

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

Three main levels of neural integration operate in the somatosensory system. Which level involves the spinal cord?

CNS nerve fibers regenerate because of the actions of Schwann cells. T/F

Regeneration within the CNS ________.

Which of the following carries no sensory information?

An emergency medical technician is examining a trauma victim by shining a pen light into her patient's eye. She records the reactivity of the patents pupils as they constrict when stimulated by the light. This test supports which of the following?

A doctor asks her patient to follow the motion of her finger as she moves it up and down, left and right. Which of the following cranial nerves is not being tested?

The cranial nerve with a cervical origin (spinal cord) is the ________.

Mixed cranial nerves containing both motor and sensory fibers include all except which of the following? a. vagus b. olfactory c. trigeminal d. facial

Spinal nerves are all classified as __________.

What is a benefit of a nerve plexus?

A dermatome represents the motor innervation of muscles in that area. T/F

A knee-jerk reflex that is unusually strong may be caused by ______.

The obturator and femoral nerves branch from this plexus.

Striking the "funny bone" (ulnar nerve) may cause injury to a nerve of this plexus

Trauma to a nerve of this plexus may cause wrist drop.

A fall or improper administration of an injection to the buttocks may injure a nerve of this plexus.

The phrenic nerve branches from this plexus.

Dermatome maps are useful to clinicians because ________.

A patient has an injury of the spine and is now suffering from a loss of motor function in his right arm. However, he still has normal sensory function in the arm. Based on this information it is likely that the patient has nervous tissue damage located at ________.

A major nerve of the lumbar plexus is the ________.

Spinal nerves exiting the cord from the level of L4 to S4 form the ________.

Dorsal and ventral rami are similar in that they both contain sensory and motor fibers. T/F

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