B5a- homeostasis and response side one

Question 1

What is homeostasis?

Answer 1

the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function.

Question 2

What do receptor cells do?

Answer 2

detect stimuli (changes in the environment)

Question 3

What are co-ordination centres?

Answer 3

receive information from receptors

Question 4

What are effectors?

Answer 4

Muscles or glands which bring about a response to restore optimum levels

Question 5

What are reflex actions?

Answer 5

Automatic and rapid
do not involve the conscious part of the brain and can protect humans from harm

Question 6

name the four sense organs

Answer 6

ears
eyes
skin
nose and tongue

Question 7

what are the ear receptors sensitive to?

Answer 7

sound and changes in position for balance

Question 8

what are the eye receptors sensitive to?

Answer 8

light

Question 9

what are the skin receptors sensitive to?

Answer 9

touch,pressure,pain and temperature

Question 10

what are the nose and tongue receptors sensitive to?

Answer 10

chemicals for smell and taste

Question 11

what is a synapse?

Answer 11

gap where neurons meet

Question 12

Reflex arc pathway order (7)

Answer 12

stimulus
receptor
sensory neurone
relay neurone
motor neurone
effector
response

Question 13

the nervous system voluntary response pathway (7)

Answer 13

stimulus
receptor
sensory neurone
coordinator
motor neurone
effector
response