4.5.1 homeostasis

Question 1

Homeostasis is…

Answer 1

The maintenance of a constant internal environment

Question 2

Name 4 internal conditions that need to be controlled?

Answer 2

water and ions
temperature
glucose
waste

Question 3

What 2 control systems do we have in our body to regulate your internal environment?

Answer 3

nervous and hormonal

Question 4

Your control systems have what 3 main components which work together to maintain a steady condition. Name them

Answer 4

• receptors
• coordination centres - brain/spinal cord/pancreas
• effectors

Question 5

what are receptors?

Answer 5

special cells that detect stimuli and then send an electrical message along the sensory neurone to the CNS

Question 5

Stimuli are..

Answer 5

changes in the environment (that are detected by receptors)

Question 6

An effector is..

Answer 6

a muscle or gland that brings about a response

Question 7

Name 4 stimuli that can be detected by receptors in the skin

Answer 7

Touch, pressure, temp, pain

Question 8

Where can receptors be found? (5)

Answer 8

Eyes, ears, tongue, nose, skin