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LC Biology > The Senses > Flashcards

The Senses Flashcards

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1
Q

what are the 5 senses

A

touch
smell
taste
sight
hear

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2
Q

what is the touch organ

A

the skin

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3
Q

what is the largest organ in the body

A

the skin

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4
Q

what does the skin contain that allows it to feel

A

contains different receptors for pain, touch and temperature.

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5
Q

why are some areas of skin more sensitive than others?

A

receptors are found a different concentration at different locations ie palm of hand is more sensitive.

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6
Q

what are the 3 layers of the skin

A

adipose tissue, dermis, epidermis

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7
Q

what does the epidermis consist of

A

cornified layer
granular layer
Malpighian layer

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8
Q

what are the 3 hair labels

A

erector muscle
hair
sebaceous gland

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9
Q

what are the 3 sweat labels

A

sweat pore
sweat duct
sweat gland

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10
Q

what is the organ of taste

A

the tongue

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11
Q

what tastes can taste buds detect

A

sweet
salty
sour
bitter

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12
Q

what is the organ of smell

A

the nose

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13
Q

what does the nose contain that allows it to detect many smells

A

the olfactory neurond

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14
Q

what is the organ of sight

A

eye

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15
Q

what are the labels for the eye

A

conjuctiva
cornea
aqueous humour
pupil
lens
iris
suspensory ligaments
ciliary muscle
sclera
choroid
retina
foyea
blind spot
optic nerve
vitreous humour
external muscle

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16
Q

function of conjunctiva

A

membrane around the eye, for protection

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17
Q

function of Sclera

A

tough white coat that holds the eye in shape

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18
Q

function of cornea

A

front part of the sclera, lets light in and bends and focuses it onto

19
Q

function of retina

A

acts as a screen for images we view. contains light receptors ie rods and cones

20
Q

function of fovea

A

part of retina where most images are formed

21
Q

function of blind spot

A

where the optic nerve leaves the retina, no cones or rods

22
Q

function of optic nerve

A

carries impules to the brain

23
Q

function of lens

A

focuses light on the retina

24
Q

function of iris

A

coloured part of eye which controls the amount of light let in

25
Q

function of pupil

A

black circle at the front of the eye, lets light into the eye

26
Q

function of ciliary muscle

A

changes the shape of the lens

27
Q

function of aqueous/vitreous humour

A

give shape to the eye

28
Q

what colours do rods detect

A

black and white

29
Q

what colours do cones detect

A

3 types of cone:
red
blue
green

30
Q

do we have more rods or cones?/

A

rods

31
Q

labels for the ear

A

pinna
auditory canal
eardrum

hammer
anvil
stirrup
(ossicles)

semi-circular canals
vestibular nerve
cochlear nerve
cochlea
eustachian tube

32
Q

what is the hearing organ

A

the ear

33
Q

what is the smallest bone in the body

A

stirrup in ear

34
Q

function of pinna

A

collect and channel vibrations

35
Q

function of auditory canal

A

carry vibrations to eardrum. lined with wax for protection

36
Q

function of eardrum

A

tightly stretched membranes that vibrate when vibrations hit it

37
Q

function of ossicles

A

amplify vibrations as they transmit them to inner ear

38
Q

function of Eustachian tube

A

opens and closes to maintain pressure and balance between outer and middle ear.

39
Q

function of cochlea (hearing)

A

vibrations converted to pressure waves at membrane in cochlea
pressure waves stimulate receptors in cochlea which sends impulses to the brain
impulses are carried to brain via cochlear nerve to interpret what we hear

40
Q

function of vestibular apparatus (balance)

A

the main parts of the vestibular apparatus are the semi circular canals
the canals contain many receptors and a liquid called lymph
when we move the liquid moves around the canals
the receptors detect this movement from the movement of the lymph and send impulses to the cerebellum

41
Q

name a hearing disorder

A

glue ear

42
Q

what causes glue ear

A

too much sticky fluid in the middle ear preventing the ear drum and ossicle movement, hindering hearing

43
Q

treatments of glue ear

A

corrected by decongestants or grommets

44
Q

what is a grommet

A

a small narrow tube that allows air into the middle ear

LC Biology (34 decks)

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