Communications

Question 1

stimulus pathway:

Answer 1

stimulus –> receptor –> mesenger –> effector –> response

Question 2

light: stimulus

organs/receptor

Answer 2

photoreceptor, eye

Question 3

sound/pressure: stimulus

organs/receptor

Answer 3

mechanoreceptor, ear, skin

Question 4

chemicals

Answer 4

chemoreceptor, tongue/nose

Question 5

conjunctiva:

Answer 5

protective layer on eye, prevent friction

Question 6

optic nerve:

Answer 6

bundles of sensory neurons, transmit impulses from retina–> brain

Question 7

cornea:

Answer 7

transparent film, help focus–> refracts light to lens

Question 8

ciliary body

Answer 8

supports the lens by ligaments, alters shape of lens

Question 9

sclera:

Answer 9

white of eye, protects eye and maintain shape

Question 10

aqueous/vitreous humour:

Answer 10

watery/jelly fluid, maintains shape of eye

Question 11

choroid:

Answer 11

contains blood vessels/ pigment, prevents internal reflection

Question 12

lens:

Answer 12

flexible clear structure, allows light enter, refracts light –> focusig image on retina

Question 13

retina:

Answer 13

photoreceptors detects light