Biology Year 8

Question 1

Central Nervous System

Answer 1

Part of the nervous system consisting of the brain and spinal cord

Question 2

Peripheral Nervous System

Answer 2

Connects the Central Nervous System to the rest of the body

Question 3

Neurons

Answer 3

Nerve cells

Question 4

Nerve

Answer 4

Made up of neurons

Question 5

Sensory Neurons

Answer 5

Sends messages to the Central Nervous System

Question 6

Interneurons

Answer 6

Carries the impulse through the Central Nervous System

Question 7

Motor Neurons

Answer 7

Takes messages away from the Central Nervous System

Question 8

Nucleus

Answer 8

Central part of the atom made up of protons and neutrons

Question 9

Organelles

Answer 9

Small structure in the cell

Question 10

Cytosol

Answer 10

Fluid inside a cell

Question 11

Cell membrane

Answer 11

Encloses the content of the cell and allows things to go through and not go through

Question 12

Cell body

Answer 12

Contains the nucleus of a neuron and also called grey matter

Question 13

Dendrites

Answer 13

Relays information to the cell body

Question 14

Axon

Answer 14

Appendage of the neuron. Nerve impulses travel along this

Question 15

Myelin

Answer 15

White substance that encases the axons

Question 16

Synapse

Answer 16

Gap between neurons

Question 17

Vesicles

Answer 17

A small cavity filled with fluid

Question 18

Neurotransmitter

Answer 18

Chemical released from axon terminals into the synapse

Question 19

Effector

Answer 19

An organ that responds to the stimulus

Question 20

Reflex arc

Answer 20

A pathway involving a small number of neurons.

The impulses travel from the receptors to the spinal cord and than to the effector organ

Question 21

Conscious response

Answer 21

An action or response done knowingly and consciously
E.g. Your friend waves at you and you say hi. This is done consciously as you don’t have to wave back. This means you do it knowingly and the action can be preventable