Q&A Reflex arc- Nervous Structures

Question 1

List the components of the reflex arch

Answer 1

Stimulus, Receptor, Sensory (afferent) neuron, Interneuron or association neuron, Motor (efferent) neuron or lower motor neuron (LMN), Effector (target) organ: the muscle or gland innervated by a motor neuron

Question 2

What aggregates of nerve cell bodies in the CNS? PNS?

Answer 2

CNS: nucleus; PNS: ganglion

Question 3

What is gray matter?

Answer 3

Part of the nervous tissue consisting of the neuronal cell bodies

Question 4

What is white matter

Answer 4

Part of the nervous tissue consisting mainly of myelinated nerve fibers/axons

Question 5

What is a nerve

Answer 5

A bundle of nerve processes outside the CNS

Question 6

What are nerve tracts or fasciculi

Answer 6

Nerve fiber bundles of common origin in the brain and spinal cord