Science Ch 22.1

Question 1

Action Potential

Answer 1

The reversal of charge. Begins when a neuron receives a chemical signal from another cell

Question 2

Autonomic Nervous System (ANS)

Answer 2

All involuntary activities are not under conscious control responsibility of this system.

Question 3

Axon

Answer 3

Long extension of the cell body that transmits nerve impulses to other cells

Question 4

Brain

Answer 4

The most complex organ of the human body and the control center of the nervous system

Question 5

Cell Body

Answer 5

Contains the nucleus and other cell organelles

Question 6

Brain Stem

Answer 6

Lowest part of the brain. It connects the rest of the brain with the spinal cord and passes nerve impulses between the brain and spinal cord.

Question 7

Central Nervous System (CNS)

Answer 7

Includes the brain and spinal cord. One of the two main divisions of the nervous system

Question 8

Cerebellum

Answer 8

It coordinates the body movements.

Question 9

Dendrites

Answer 9

Extend from the cell body and receive nerve impulses from other neurons

Question 10

Drug Abuse

Answer 10

The use of a drug without advice of a medical professional and for reasons not originally intended

Question 11

Drug Addiction

Answer 11

In which drug users are unable to stop the using of drugs

Question 12

Interneuron

Answer 12

Carry nerve impulses back and forth between sensory and motor neurons

Question 13

Motor Neuron

Answer 13

Carry nerve impulses from the brain and spinal cord to muscles and glands

Question 14

Myelin Sheath

Answer 14

The outer layer of an axons many neurons. It acts like a layer of insulation

Question 15

Nerve

Answer 15

Cable-like bundle of axons

Question 16

Nerve Impulse

Answer 16

The electrical signals that the neuron sends

Question 17

Nervous System

Answer 17

Complex network of nervous tissue that carries electrical messages throughout the body

Question 18

Neuron

Answer 18

Are the structural and functional units of the nervous system

Question 19

Neurotransmitter

Answer 19

Endogenous chemicals that allow neurons to communicate with each other throughout the body

Question 20

Peripheral Nervous System (PNS)

Answer 20

Consists of all the nervous tissue that lies outside the central nervous system

Question 21

Psychoactive Drug

Answer 21

This means they affect the central nervous system, generally by influencing the transmission of nerve impulses

Question 22

Resting Potential

Answer 22

The electrical potential difference between the inside and outside of a neuron

Question 23

Sensory Receptors

Answer 23

Specialized cells that detect changes in the environment and convert these changes into electrical signals that can be processed by the nervous system

Question 24

Somatic Nervous System (SNS)

Answer 24

Controls mainly voluntary activities that are under conscious control

Question 25

Spinal Cord

Answer 25

Is a thin, tubular bundle of nervous tissue that extends from the brainstem and continues down the center of the back to the pelvis

Question 26

Synapse

Answer 26

The place where an axon terminal meets another cell