homeostasis

Question 1

what is homeostasis

Answer 1

maintenance of a constant internal environment eg temperature, water

Question 2

list the body responses to the environment being too cold

Answer 2

shivering - muscles contract quickly to make heat
goosebumps - hairs trap body heat
reduced sweat production
vasoconstriction - blood vessels become narrower, conserving heat

Question 3

list the body responses to the environment being too hot

Answer 3

sweat produced to release heat energy
hair lays flat
vasodilation - blood vessels dilate letting heat to be lost

Question 4

define negative feedback

Answer 4

automatic response to changing conditions and returning them back to normal
this may involve either nervous responses or chemical responses

Question 5

what is the body’s sensor

Answer 5

hypothalamus - found in the thermoregulatory region of the brain

Question 6

what is change in temperature detected by

Answer 6

thermoreceptors
skin receptors
hypothalamus

Question 7

list the different levels maintained by homeostasis

Answer 7

temperature
water
sugar levels

Question 8

define receptor

Answer 8

cells that receives a stimuli

Question 9

define coordination centres

Answer 9

receives and processes information from receptors around the body eg spine, brain

Question 10

define effectors

Answer 10

produces a response to a detected stimulus eg muscles, glands