The Brain, Spinal Cord and Autonomic Ner

The parasympathetic nervous system is characterized by ____ preganglionic neurons and ____ postganglionic neurons.

• long; long

• long; short

• short; short

• short; long

Which of the following is an action of the sympathetic nervous system?

• constriction of bronchioles

• increase peristalsis of the intestines

• decrease heart rate

• increase secretion of sweat

What division of the nervous system functions independently and continuously, without conscious effort?

• somatic nervous system

• autonomic nervous system

• peripheral nervous system

• automatic nervous system

Masses of myelinated nerve fibers appear

• red

• brown.

• white

• gray

Which of the following lists parts of a reflex arc in the correct sequence?

• Receptor, motor neuron, sensory neuron, effector

• Receptor, sensory neuron, motor neuron, effector

• Effector, receptor, sensory neuron, motor neuron

• Effector, sensory neuron, receptor, motor neuron