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Honors Anatomy & Physiology > Special Senses > Flashcards

Flashcards in Special Senses Deck (19):
1

Special senses include? (5)

vision
taste
smell
hearing
equilibrium

2

sensation
definition? depends on? ex?

conscious/subconscious awareness of changes in internal/external environment (think of senses)
type of sensation depends on destination of nerve impulse
ex) reflexes vs vision

3

perception
definition? location?

conscious awareness & interpretation of sensations
occur in cerebral cortex
(hair stands up when someone approaches)

4

sense receptors (2)

general receptors
special receptors

5

general receptors

receptors distributed throughout body
sensory neurons
EX) Skin, organs

6

special receptors

receptor cells in localized areas
EX) head, eyes, ears, mouth
(like taste buds, rods & cones)

7

how we get sensations (4)

1) Stimulate a sense receptor
2) conversion of the stimulus
-energy created by stimuli converted to graded potential (electrical energy)
3) Generation of nerve impulse
-impulse travels to CNS
4) Integration of sensory input
-interpreted in cerebral cortex

8

Sense receptors - LOCATION classification (3)

exteroceptors
interoceptors
proprioceptors

9

Exteroceptors
definition? location? senses..?

external conditions stimuli
-located on or near surface of body
-hearing (vibration), pain, pressure, vision, temp.,taste, touch, smell

10

interoceptors
definition? location? ex?

internal conditions stimuli
-located in visceral organs, blood vessels, muscles
-not consciously felt
(help turn food you just ate)

11

proprioceptors
location? senses?

-located in muscles, joints, tendons, inner ear, nervous system
-body position, muscle tension, movement, weight discrimination

12

sense receptors - STIMULUS classification (5)

mechanoreceptors
thermoreceptors
nociceptors
osmoreceptrs
photoreceptors

13

Mechanoreceptors
senses...? examples?

mechanical stimuli- deformation, stretching, or bending of cells
EX) pressure, vibration, equilibrium

14

Thermoreceptors
senses..?

changes in temp

15

Nociceptors
senses...?

pain from physical or chemical tissue damage
(burn/poke yourself, smash finger in drawer)

16

Osmoreceptors
senses...?

osmotic pressure of body fluids (certain pressure to flow properly)

17

Chemoreceptors
senses..?

chemicals in mouth, nose, body fluids (chemicals in food & perfume)

18

Photoreceptors
senses..?

light strikes retina

19

sensory adaptation in brain
sensory input? brains abilities? example?

(brains adapt to focus)
brain prioritizes sensory input
-can get 'sense' overload
-has ability to ignore unimportant 'background' stimuli
EX) playing music while reading or studying
(Autism story, ADD/ADHD cannot focus bc have problems w/ sensory overload