spinal cord nerves & general senses quiz

Which of the following is not a type of sensory receptor?

interceptor

Which of the following is false regarding spinal nerves?

They are either sensory or motor but not both.

Which spinal nerve innervates the diaphragm?

phrenic nerve

Which spinal nerve innervates the hypothenar muscles and the skin along the medial aspect of the hand?

ulnar nerve

What is the largest nerve emanating from the lumbar plexus?

femoral nerve

True or false, the area of skin sensation innervated by a single spinal level is known as a myotome.

false

Which cranial nerve provides sensory data from the thoracic and abdominal viscera?

vagus nerve

Which of the following is false regarding receptors?

Sensory receptors are evenly distributed in the body.

Proprioceptors are found in the epidermis and are sensitive to light touch.

false

The somatosensory cortex can confuse the source of pain sensation when axons from visceral pain receptors are carried by the same spinal nerve as cutaneous pain receptors.

true

I'm carrying a large box when my wife suddenly adds a second heavy box to the load.  As a result, my elbow flexors reflexively contracts to keep me from dropping the boxes on my feet.  Why does this happen?

Muscle spindles are stretched which reflexively contracts the biceps.

The withdrawal reflex is ipsilateral while the crossed-extensor reflex is contralateral.

true

I drank 2 six packs of beer and passed out with my arm draped over the arm of a chair.  When I woke up, the top (dorsum) of my hand was numb and I couldn't extend my wrist.  What peripheral nerve did I injure?

radial nerve

Torn axons in the CNS commonly regenerate while those in the PNS do not.

false

Which of the following is false regarding the spinal cord?

The cell bodies of lower motor neurons are in the dorsal horn of the spinal cord.

Which of the following is true regarding ascending spinal cord tracts?

The axon of the secondary neuron decussates within the spinal cord.

Which of the following is false regarding descending spinal cord tracts?

The cell body of the lower motor neuron is in the posterior horn of the spinal cord.

How many pairs of lumbar spinal nerves are there?

5

The brachial plexus innervates which of the following structures?

Skin and muscles of the upper extremities

If you stroke the sole of a newborn baby's foot and the big toe dorsiflexes, this is a sign of a brain or spinal cord abnormality.

false