Systems

Question 1

Nervous system

Answer 1

the system of nerves and nerve centres in an animal in which messages are sent as an electrical and then a chemical impulse. It comprises the central nervous system and the peripheral nervous system.

Question 2

Central nervous system

Answer 2

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

Question 3

Peripheral nervous system

Answer 3

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 4

Electrical impulses

Answer 4

nerve signals that pass rapidly from the receptors and along the peripheral nervous system to the central nervous system

Question 5

Neurotransmitters

Answer 5

chemical released from the axon terminals into the synapse between your nerve cells (neurons) during a nerve impulse

Question 6

Synapses

Answer 6

the gap between adjoining neurons across which electrical nervous impulses are sent

Question 7

Endocrine system

Answer 7

the body system of glands that produce and secrete hormones into the bloodstream in order to regulate processes in various organs

Question 8

Endocrine glands

Answer 8

organs that produce hormones. Endocrine glands release their hormones into the bloodstream for transport to target organs.

Question 9

Hormones

Answer 9

chemical substances produced by glands and circulated in the blood. Hormones have specific effects in the body.