Chapter 2

Question 1

neurons

Answer 1

nerve cells that specialize in communication

Question 2

Central Nervous System

Answer 2

the brain and spinal chord

Question 3

Peripheral Nervous System

Answer 3

all neurons going to and from the central nervous system aka neurons in the extremities

Question 4

Somatic Division

Answer 4

voluntary muscle movements

Question 5

Autonomic Division

Answer 5

automatic functions like breathing, digestion, and heartbeat

Question 6

Sympathetic Division

Answer 6

prepares body for stress/threat

Question 7

Parasympathetic

Answer 7

calms body down

Question 8

Sensory Neurons

Answer 8

carry info from the sense receptors to the central nervous system

Question 9

Motor Neurons

Answer 9

carry info from the central nervous system to muscles and glands

Question 10

Interneurons

Answer 10

communicate only with other neurons, usually really small and only communicate with a specific region

Question 11

Dendrites

Answer 11

branch-like fibers that receive messages from other neurons

Question 12

Cell Body

Answer 12

processes messages and then sends them along the axon

Question 13

Axon

Answer 13

carries a message through the length of the neuron to the terminal buttons

Question 14

Myelin Sheath

Answer 14

protective coating that surrounds the axon and speeds up the transmission of messages

Question 15

Terminal Buttons (Axon Terminals)

Answer 15

small modules at the end of the axon that release chemicals out for other neurons

Question 16

resting state

Answer 16

negative electric charge within the neuron

Question 17

synapse

Answer 17

where the neurons meet and transfer chemicals to eachother

Question 18

All or none law

Answer 18

the neuron either fires or it doesnt it can not fire at varying levels

Question 19

Neurotransmitters

Answer 19

chemical that go from one neuron to another

Question 20

reuptake

Answer 20

reabsorption of extra neurotransmitters by terminal buttons

Question 21

Exicitatory Message

Answer 21

makes neurons fire

Question 22

Inhibitory message

Answer 22

prevents neurons from firing