The nervous system enables the body to respond and adapt to changes that occur both inside and outside the body.

• True

• False

The central nervous system has two divisions: the somatic nervous system and the autonomic nervous system.

• True

• False

The spinal cord ends at the fourth or fifth thoracic vertebra.

• True

• False

The pons is responsible for reflex actions including chewing, tasting, and saliva production.

• True

• False

Spinal nerves are mixed nerves, both afferent and efferent.

• True

• False

The sympathetic nervous system slows heart rate, decreases respiration, and increases activity in the digestive tract.

• True

• False

The basic structural unit of the nervous system is the ____.

• dendrite

• neuron

• neurilemma

• nucleus

A nerve fiber that carries impulses toward the cell body is a/an ____.

• dendrite

• axon

• neuron

• myelin

The part of the brain responsible for muscle coordination, balance, posture, and muscle tone is the ____.

• cerebrum

• cerebellum

• diencephalon

• medulla oblongata

The part of the brain that regulates heartbeat, respiration, swallowing, coughing, and blood pressure is the ____.

• pons

• midbrain

• medulla oblongata

• cerebrum