The Nervous System

Question 1

Sensory neurons

Answer 1

Conduct impulses to the spinal cord and brain. Afferent

Question 2

Motor neurons

Answer 2

Conduct impulses away from brain and spinal cord to muscles and glands. Efferent

Question 3

Interneurons

Answer 3

Conduct impulses form sensory neurons to motor neurons. Connecting

Question 4

Glia or neuroglia

Answer 4

Support cells. Hold neurons together, protect them and regulate neurons function

Question 5

Astrocytes

Answer 5

Star shaped cells that anchor small blood vessels to neurons

Question 6

Microglia

Answer 6

Small cells that move in inflamed brain tissue carrying on phagocytosis

Question 7

Oligodendrocytes

Answer 7

Form myelin sheaths on axons in the CNS.

Question 8

Schwann cells

Answer 8

Form myelin sheaths in PNS ONLY

Question 9

What causes MS

Answer 9

Myelin loss in central nerve fibers resulting conduction impairments

Question 10

What is the general name for nervous system tumors?

Answer 10

Neuroma

Question 11

Most neuromas are?

Answer 11

Gliomas. Glia tumors

Question 12

What is white matter?

Answer 12

Brain or cord tissue composed primarily of myelinated axons (tracts)

Question 13

What is grey matter?

Answer 13

Brain or cord tissue composed primarily of cell bodies and unmyelinated fibers and dendrites

Question 14

Endoneurium

Answer 14

Surrounds individual fibers within nerve

Question 15

Perímetros

Answer 15

Surrounds a group of nerve fibers

Question 16

Epineurim

Answer 16

Surrounds entire nerve

Question 17

What are nerve impulses

Answer 17

Self propagating wave of electrical disturbances that travels along the surface of a neuron membrane. Called action potentials

Question 18

Which action potential is faster? Also called saltatory conduction

Answer 18

Myelinated fiber because the action potential jumps around the myelin

Question 19

Formation of cerebrospinal fluid occurs in the

Answer 19

Choroid plexus

Question 20

Limbic system integrates

Answer 20

Emotion

Question 21

Autonomic nervous system

Answer 21

Subdivision of nervous system that regulates involuntary functions

Question 22

the synapse

Answer 22

place where impulses are transmitted from one neuron to another

Question 23

synaptic knob

Answer 23

neurotransmiters are in vesicles. released into the synaptic cleft

Question 24

synaptic cleft

Answer 24

space between knob and plasma membrane where neurotransmitters travel

Question 25

plasma membranes of postsynaptic neuron

Answer 25

receptor molecules open ion chanels and thereby initiates impulse conduction

Question 26

parkinson disease

Answer 26

characterized by abnormally low levels of dopamine in motor control areas of the brain

Question 27

what 3 parts does the brainstem consist of

Answer 27

midbrain, pons and medulla obongata

Question 28

cerebellum

Answer 28

second largest part. controls muscle contractions to produce coordinated movements. maintain balance

Question 29

Cerebrum

Answer 29

largest part of human brain. outer layer of gray matter. interior of white matter. sensations, consciousness, memory

Question 30

cerebrovascular accident

Answer 30

stroke, hemorrhage from or cessation of blood flow through cerebral blood vessels

Question 31

cerebral palsy

Answer 31

damage to motor control areas of the brain

Question 32

dementia

Answer 32

progressive memory loss

Question 33

alzheimer disease

Answer 33

brain disorder of the middle and late adult years

Question 34

huntington disease

Answer 34

inherited disorder characterized by chorea progressing to severe dementia