1. nervous communication

Question 1

respons to environment

Answer 1

helps organisms survive

Question 2

response to internal environment

Answer 2

conditions optimum for metabolism

Question 3

response to external environment

Answer 3

avoid harm

Question 4

receptors

Answer 4

detect stimuli

Question 5

effectors

Answer 5

cause respones to stimulus e.g. muscle cells

Question 6

sensory neurones

Answer 6

electrical impulse from receptors to CNS

Question 7

motor neurones

Answer 7

electrical impulse from CNS to effectors

Question 8

relay neurones

Answer 8

electrical impulse between sensory and motor

Question 9

neurotransmitters

Answer 9

electrical impulse reaches end of neurone chemicals (neurotransmitters) take info to next neurone

Question 10

CNS / relay neurone

Answer 10

made of brain and spinal chord
coordinator.
processes info.
sends impulse from motor neurone to effector

Question 11

pathway

Answer 11

stimulus -> receptor -> CNS -> effector -> response

Question 12

somatic nervous system

Answer 12

conscious activities

Question 13

autonomic

Answer 13

unconscious activities
split into sympathetic (action)
and parasympathetic (calms)

Question 14

reflex

Answer 14

unconscious
fast (dont have to decide) -> protects

Question 15

reflex arc

Answer 15

receptor -> sensory -> relay -> motor -> effector -> response

Question 16

nervous system communication is

Answer 16

localised - directly onto target cells
short-lived -> neurotransmitters quick removed after
rapid -> electrical impulses fast