Nervous System

Question 1

Divisions of the NS?

Answer 1

CNS & PNS

Question 2

Functions of NS?

Answer 2

Sensory information input, integration and analyzation, and motor output

Question 3

Components of CNS?

Answer 3

Brain & Spinal Cord

Question 4

Functions of CNS?

Answer 4

Process sensory information, produce thoughts, emotions & memories, and stimulate effectors

Question 5

Components of PNS?

Answer 5

Any nervous tissue besides spinal cord and brain - nerves, ganglia, enteric plexuses, sensory receptors

Question 6

Functions of PNS?

Answer 6

Provide communication network between brain and body

Question 7

Divisions of PNS?

Answer 7

Somatic, autonomic and enteric branches

Question 8

What is SNS?

Answer 8

Somatic NS provides voluntary conscious motor responses to only skeletal muscle

Question 9

What is ANS?

Answer 9

Autonomic NS provides involuntary unconscious motor responses to smooth muscle, glands and non skeletal muscle

Question 10

Divisions of ANS?

Answer 10

Sympathetic fibers are fight or flight, while parasympathetic are rest/digest functions

Question 11

Sensory division?

Answer 11

Take sensory responses to brain

Question 12

Motor division?

Answer 12

Receive motor info from brain

Question 13

What are action potentials?

Answer 13

The pass of electrical impulses between neurons

Question 14

Parts of Neuron?

Answer 14

Cell (soma), dendrites and axon

Question 15

Nuclei?

Answer 15

Cell bodies in CNS

Question 16

Ganglia?

Answer 16

Cell bodies in PNS

Question 17

Tracts?

Answer 17

Bundles of processes (axons and dendrites) in CNS

Question 18

Nerves?

Answer 18

Bundles of processes in PNS

Question 19

Functions of dendrites?

Answer 19

receive input from neurons - receptive region

Question 20

Functions of Axon?

Answer 20

Conduct nerve impulses to other nerves from axon hillock to axon terminals

Question 21

Synapse?

Answer 21

Region of communication between neurons or an effector cell

Question 22

Synaptic bulbs?

Answer 22

Located at the ends of axon terminal and contain synaptic vesicles filled with neurotransmitter

Question 23

Synaptic cleft?

Answer 23

Small space between the axon and the body of another neuron, where neurotransmitters on to the dendrites of the next neuron

Question 24

Interneurons?

Answer 24

Mainly in CNS and act as middle man between sensory and motor neurons

Question 25

Astrocytes? CNS

Answer 25

star-shaped, most abundant glia, anchor neurons to blood and create blood-brain barrier

Question 26

Microglia? CNS

Answer 26

Phagacytose damaged nervous cells

Question 27

Ependymal? CNS

Answer 27

Line central cavities of the brain and contain cuboidal cells and microvilli and villi to help produce and circulate CSF

Question 28

Oligodendrocyte? CNS

Answer 28

Form myelin sheath around CNS axons

Question 29

Satellite? PNS

Answer 29

Similar to astrocytes

Question 30

Schwann? PNS

Answer 30

Myelinate PNS axons

Question 31

Functions of Myelin Sheath?

Answer 31

Insulate axons and increase electrical speed

Question 32

Node of Ranvier?

Answer 32

Gaps in myelin sheath in intervals along axon

Question 33

White matter?

Answer 33

Mainly myelinated axons

Question 34

Grey matter?

Answer 34

Unmyelinated axons, dendrites

Question 35

Matter look in spine?

Answer 35

Grey matter butterfly surrounded by white matter