Biology

Question 1

Central nervous system

Answer 1

the part of the nervous system composed of the brain and spinal cord

Question 2

Peripheral nervous system

Answer 2

made up of sensory and motor neurons. It connects the central nervous system to the rest of the body, and detects and responds to change.

Question 3

Neurons

Answer 3

Nerve cell

Question 4

Nerves

Answer 4

A bundle of neurons

Question 5

Sensory neurons

Answer 5

A nerve cell in the sense organs. It detects change in the environment and sends a message to the central nervous system.

Question 6

Interneurons

Answer 6

a nerve cell that carries nervous impulses through the central nervous system. They provide the link between sensory neurons and motor neurons.

Question 7

Motor neurons

Answer 7

the nerve cell that causes an organ, such as a muscle or gland, to respond to a stimulus

Question 8

Nucleus

Answer 8

central part of an atom, made up of protons and neutrons; roundish structure inside a cell that acts as the control centre for the cell. Plural = nuclei.

Question 9

Organelles

Answer 9

small structure in a cell with a special function

Question 10

Cytosol

Answer 10

the fluid found inside cells

Question 11

Cell membrane

Answer 11

structure that encloses the contents of a cell and allows the movement of some materials in and out

Question 12

Cell body

Answer 12

contains the nucleus of a neuron, also called grey matter

Question 13

Dendrites

Answer 13

structure that relays information towards the cell body of a neuron

Question 14

Axon

Answer 14

an appendage of the neuron that nervous impulses travel along to the next neuron or to an effector organ (muscle or gland)

Question 15

Myelin

Answer 15

a fatty, white substance that encases the axons (connecting branches) of the neurons in the nervous system