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Bio 30 > Topic 3 Sensory reception > Flashcards

Topic 3 Sensory reception Flashcards

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Biology 101 flashcards
1
Q

sensation occurs when

A

neural impulses generated by the stimulation of sensory receptors arrive at cerebral cortex

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2
Q

Sensory adaptation is

A

the brain filtering out redundant (not important) sensory info to prevent overstimulation
happens w things that r constantly repeated too

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3
Q

sensory receptors

A

photoreceptors, chemoreceptors, mechanoreceptors and thermoreceptors

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4
Q

photoreceptors are stimulated by what w what

A

stimulated by light by eye receptors

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5
Q

chemoreceptors are stimulated by what with what receptors

A

stimulated by chemicals by nose or tongue receptors

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6
Q

Mechanoreceptors are stimulated by what and with what

A

stimulated by pressure taken in ear receptors

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7
Q

Thermoreceptors are stimulated by what n where

A

stimulated by heat and cold by skin receptors

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8
Q

vision is associated w stimulation of ____
where r they n stimulated by what

A

photoreceptors, at back of the eye by light energy

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9
Q

the eye is made of _ layers n they are

A

3, Sclera, Choroid and Retina

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10
Q

The first layer of the eye is the

A

Sclera, tough outer layer

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11
Q

The sclera includes the ___ which is/dose what

A

Cornea : the front protective transparent layer of the sclera where light is bent (refracted) to fovea centralis

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12
Q

Astigmatism is the

A

unequal curvature of tge cornea

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13
Q

the middle layer of the eye is the ____

A

Choroid

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14
Q

the choroid has/is what

A

has blood vessels to nourish the eye and is dark in colour to absorb the light

the iris: pigmented muscle controlling amnt of light entering
ciliary body: muscle atteched to lens for focusing

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15
Q

Ciliary body is

A

a muscle attached to the lens for focusing

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16
Q

iris is a

A

pigmented muscle controlling the amount of light entering the eye

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17
Q

the middle layer of eye is the ___ and made up of

A

Choroid, has iris and ciliary body

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18
Q

the third/inner layer is the

A

Retina

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19
Q

the retina is made up of

A

ganglion layer, photoreceptor layer, rods and cones located in periphery

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20
Q

ganglion layer is

A

one that forms optic nerve that exits back of eye (blind spot)
located in retina

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21
Q

photoreceptor layer is

A

one w rods and cones

22
Q

the rods are

A

located on periphery in photoreceptor layer and for night vision

23
Q

the cones are

A

concentrated near centre of photoreceptor layer have the fovea centralis w most accurate and colour vision

24
Q

Pupil is

A

opening in front of eye, not structure just a hole

25
Q

Adaptation is

A

the pupil dilating and constricting

26
Q

The lens is

A

behind pupil, focusing light on retina

27
Q

accomodation is

A

lens changing shape based on if objects are near or far to see tgem better

28
Q

aqueous humour is

A

the liquid clear thing infront of cornea maintaining its shape

29
Q

Vitreous humour is

A

liquid in eyeball maintaining its shape

30
Q

the blind spot is the

A

optic disc

31
Q

you want the most light

A

in the fovea centralis where there are the most cones

32
Q

the optic nerve and optic disc

A

takes the message to the brain and is the blind spot w no rods or cones

33
Q

vision pathway

A

cornea>pupil>lens>photoreceptors>retina>occipital lobe via optic nerve

34
Q

Myopia is

A

nearsightedness, inability to see objects at a distance

eyeball is elongated so focused light falls in front of retina

35
Q

Hyperopia is

A

farsightedness, inability to see close objects

eyeball is shortend so focused light falls behind the retina

36
Q

colourblindness is

A

a generic condition affecting the cones caused by the lack of specific cones or colour receptors

37
Q

Pinna is the

A

squishy outer ear part that direct sound waves to auditory canal

38
Q

tympanic membrane or tympanum is the

A

ear drum, where sound waves strike and vibrations are passed on

39
Q

Outer ear includes

A

the pinna and ear/auditory canal

40
Q

Middle ear includes

A

ear drum or tympanic membrane and 3 ossicles/bones; stapes incus and malleus

41
Q

the ossicles are

A

the 3 bones in middle ear

42
Q

the inner ear includes

A

cochlear, semicircular canals , vestibular nerve, facial nerve, auditory nerve and organ of corti

43
Q

Organ of corti is

A

organ in inner ear within cochlea where sound is tuned to action potential after hairs inside are stimulated by pressure change in ear

44
Q

cochlear is

A

the shell looking thing in ear containing organ of cori and hairs generating action potential to be sent to temporal lobe

45
Q

structures of ear not associated w hearing are

A

semicircular canals and eustachean tube

46
Q

Semicircular canals are

A

part of brain filled w fluid where pressure change causes waves to maintain balance

47
Q

the eustachean tube is

A

one connecting eats with throat allowing air pressure to equalize

48
Q

chemoreceptors for taste are

A

on the tongue and send impulses to parietal lobe

49
Q

chemoreceptors for smell are

A

in the nasal cavity known as olfactory cells and transmit signals to olfaction bulb in the brain

50
Q

proprioception is

A

perception of movement and body position in space(muscles)

51
Q

mechanoreceptors are

A

associated w hearing with fluctuations in air pressure (sound waves) , they convert energy of sound into electrochemical impedance to brain and balance through converting the energy of liquid movement into electrochemical impulses

Bio 30 (8 decks)

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