3 Control and Communication

Question 1

central nervous system (CNS)

Answer 1

body system made up of brain plus spinal cord

Question 2

nervous system

Answer 2

system made up of brain, spinal cord and nerves

Question 3

cerebrum

Answer 3

part of brain responsible for conscious thought

Question 4

cerebellum

Answer 4

part of brain which controls balance and coordination

Question 5

medulla

Answer 5

part of brain which controls unconscious functions like heart rate and breathing

Question 6

reflex arc

Answer 6

arrangement of sensory, relay and motor neurons which leads to a reflex action

Question 7

reflex action

Answer 7

rapid automatic response to a stimulus for protection from harm

Question 8

stimulus

Answer 8

something detected by a receptor which triggers a nerve impulse

Question 9

effector

Answer 9

muscle or gland which responds to a nerve impulse

Question 10

receptor

Answer 10

sense organ which converts a stimulus to a nerve impulse

Question 11

neuron

Answer 11

nerve cell

Question 12

synapse

Answer 12

gap between 2 neurons across which a chemical transfers the impulse

Question 13

hormone

Answer 13

chemical messenger which is released into the bloodstream by an endocrine gland

Question 14

insulin

Answer 14

hormone produced by pancreas which stimulates liver to convert glucose from blood into glycogen

Question 15

glucagon

Answer 15

hormone produced by pancreas which converts glycogen to glucose

Question 16

pancreas

Answer 16

organ which produces glucagon and insulin

Question 17

glycogen

Answer 17

carbohydrate produced from glucose and stored in the liver

Question 18

liver

Answer 18

organ which converts glucose to glycogen which it stores

Question 19

target tissues

Answer 19

tissues which have cells with receptors for hormones