Chapter 13 The Spinal Cord and Spinal Nerves Self Quiz Questions

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Fill in the blank.

Because they contain both sensory and motor axons, spinal nerves are considered to be nerves.

Fill in the blank.

The five components of a reflex arc, in order from the beginning to the end, are (1) (2) (3) (4) , and (5) .

True OR False.

Gray matter of the spinal cord contains somatic motor and sensory nuclei, autonomic motor and sensory nuclei, and functions to receive and integrate both incoming and outgoing information.

True OR False.

The epidural space is located between the wall of the vertebral canal and the pia mater.

Multiple Choice.

Which of the following is not true?

(1) Dermatomes are areas of the body that are stimulated by motor neurons exiting specific spinal nerves.

(2) The stretch reflex helps to maintain muscle tone.

(3) The Achilles reflex is an example of a stretch reflex.

(4) The abdominal reflex is sued to diagnose problems with autonomic reflexes.

(5) Spinal nerves T2-T12 do not enter into the formation of a plexus.

(a) 1, 2, and 4

(b) 2 and 5

(c ) 1 and 4

(d) 1, 3, and 5

(e) 1, 3, and 4

Multiple Choice.

While identifying and labeling cadaver muscles, your lab partner accidentally pokes your finger with a pin.
Place the following steps in the correct order from beginning to end of your body’s response.

(1) Impulses travel through anterior (ventral) root of spinal nerve(s).

(2) Sensory neuron relays impulse to spinal cord.

(3) Motor impulses reach muscles, causing withdrawal of the affected limb.

(4) Integrating centers interpret sensory impulses, and then generate motor impulses.

(5) Sensory receptor activated by stimulus.

(6) Impulse travels through posterior (dorsal) root of spinal nerve.

(a) 5, 3, 6, 4, 1, 2

(b) 5, 2, 1, 4, 6, 3

(c ) 5, 2, 6, 4, 1, 3

(d) 3, 5, 1, 2, 4, 6

(e) 2, 1, 5, 4, 6, 3

Multiple Choice.

The connective tissue surrounding each individual axon is

(a) endoneurium

(b) epineurium

(c ) perineurium

(d) fascicle

(e) arachnoid mater

Multiple Choice.

The tracts of the posterior column are involved in

(1) conscious proprioception

(2) touch

(3) pain

(4) thermal sensations

(5) pressure

(6) vibration

Multiple Choice.
Which of the following is a motor tract?

(a) posterior spinocerebellar

(b) lateral spinothalamic

(c ) anterior spinocerebellar

(d) lateral corticospinal

(e) posterior column

Multiple Choice.

Cutting the posterior root of a spinal nerve would

(a) interfere with the circulation of cerebrospinal fluid

(b) impair motor control of skeletal muscles

(c ) interfere with the ability of the brain to transmit motor impulses

(d) impair motor control of organs

(e) interfere with the flow of sensory impulses

Multiple Choice.

Which of the following statements is false?

(a)

(b)

(c )

(d)

(e)

Multiple Choice.

Which of the following are true?

(1) The anterior (ventral) gray horns contain cell bodies of neurons that cause skeletal muscle contraction.

(2) The gray commissure connects the while matter of the right and left sides of the spinal cord.

(3) Cell bodies of autonomic motor neurons are located in the lateral gray horns.

(4) Sensory (ascending) tracts conduct motor impulses down the spinal cord.

(5) Gray matter in the spinal cord consists of cell bodies of neurons, neuroglia, unmyelinated axons, and dendrites of interneurons and motor neurons.

(a) 1, 2, 3, and 5

(b) 2 and 4

(c ) 2, 3, 4, and 5

(d) 1, 3, and 5

(e) 1, 2, 3, and 4

stretch reflex

tendon reflex