B10

Question 1

central nervous system (CNS)

Answer 1

the part of the nervous system where information is processed. It is made up of the brain and spinal cord

Question 2

coordination centres

Answer 2

areas that receive and process information from receptors

Question 3

effectors

Answer 3

areas (usually muscles or glands) that bring about responses in the body

Question 4

homeostasis

Answer 4

the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function, in response to internal and external changes

Question 5

motor neurones

Answer 5

carry impulses from the central nervous system to the effector organs

Question 6

nerve

Answer 6

bundle of hundreds or even thousands of neurones

Question 7

neurones

Answer 7

basic cells of the nervous system that carry minute electrical impulses around the body

Question 8

receptors

Answer 8

cells that detect stimuli – changes in the internal or external environment

Question 9

reflex arcs

Answer 9

bring about a reflex action. They involve the sense organ, sensory neurone, relay neurone and motor neurone

Question 10

reflexes

Answer 10

rapid automatic responses of the nervous system that do not involve conscious thought

Question 11

sensory neurone

Answer 11

neurone that carries impulses from the sensory organs to the central nervous system

Question 12

stimuli

Answer 12

changes in the external or internal environment that can be detected by receptors