Lecture 1- CNS, PNS, tracts

Question 0

Define dendrite

Answer 0

One of the threadlike extensions of the cytoplasm of a neuron. Compose most of the receptor sites on the surface of neuron (receives info)

Question 1

Define neuron

Answer 1

Individual cell responsible for conducting impulses

Question 2

Define axon

Answer 2

Singular fiber that carries info away (sometimes long distance) from the cell body to synapse sites of other neurons, muscles, or glands

Question 3

Define myelin

Answer 3

Surrounds the axon of the neuron - lines the nerve fibers, aids in quick and accurate transmission of electrical current carrying data from one nerve cell to the next

Question 4

Define gray matter

Answer 4

Cell bodies and dendrites and/or unmyelinated axons, color comes from capillaries and lack of myelin, cerebral cortex, and central portion of spinal cord

Question 5

Define white matter

Answer 5

Myelinated axons from multiple neurons, includes tracts in spinal cord and internal capsule of brain

Question 6

Define synapse

Answer 6

Gap between two neurons where signal transmission occurs

Question 7

Define tract

Answer 7

Group of neurons inside the CNS