Homeostasis

Question 1

receptors for gravity

Answer 1

hair cells in the vestible

Question 2

receptors for light

Answer 2

photoreceptor cells

Question 3

receptors for sound

Answer 3

hair cells in cochlea

Question 4

receptors for airborne chemicals

Answer 4

olfactory receptors

Question 5

receptors for dissolved chemicals

Answer 5

taste buds

Question 6

receptors for external pressure

Answer 6

dermal pressure receptors

Question 7

pain receptors

Answer 7

nerve endings in skin

Question 8

receptors for temperature

Answer 8

nerve endings in the skin/ thermoreceptors

Question 9

receptors for blood PH/ CO2

Answer 9

chemoreceptors in blood vessels

Question 10

receptors for blood pressure

Answer 10

baroreceptors

Question 11

what is homeostasis?

Answer 11

the maintenance of a constant internal environment within a living organism.

Question 12

what things have to be maintained?

Answer 12

body temperature
blood glucose
blood salt conc
water potential of blood
blood pressue

Question 13

what is the response pathway?

Answer 13

stimulus — receptor — communication pathway — effector — response

Question 14

what does a negative feedback loop do?

Answer 14

reverses changes in internal environment

Question 15

what does positive feedback do?

Answer 15

reinforces changes in internal environment

Question 16

what role does the liver play in a negative feedback loop?

Answer 16

it is a effector as it is the site of metabolic reactions so van increase the rate if respiration producing heat.

Question 17

what role does the hypothalamus play in a positive feedback loop involving internal temperature?

Answer 17

it works as a receptor for changes in core body temperature by monitoring temperature of your blood.

Question 18

how do tissues and organs communicate?

Answer 18

through cell signalling