Unit 7: Sensory System Flashcards
SENSORY RECEPTORS combine with m_ and t_ to form SENSE ORGANS
muscles and tissue
Most SENSORY RECEPTORS consist of specialized _ cells
NERVE CELLS (or nerve endings)
SENSORY RECEPTORS transmit info about (TLI)
T_ of stimulus
L_ of stimulus
I_ of stimulus
type
location
intensity
5 types of sensory receptors.
1. CHEMOreceptors respond to _ in the body
Chemoreceptors respond to ODORS in body
5 types of sensory receptors.
2. MECHANOreceptors detect p_, STRETCH, or VIBRATION
PRESSURE, stretch or vibration
5 types of sensory receptors.
3. THERMOreceptors detect _ changes
temperature
5 types of sensory receptors.
4. NOCIceptors detect _
pain
5 types of sensory receptors.
5 PHOTOreceptors detect _
light
General senses include PAIN, PRESSURE, TOUCH, STRETCH & TEMP
General senses involve receptors widely distributed in _, _, _
muscles, tendons, skin, joings
NOCICEPTORS (pain) are found in s_ and m_ membranes, as well as EVERY ORGAN
NOCICEPTORS use fast and slow _ fibers
SKIN
MUCOUS membranes
fast and slow PAIN fibers
Fast pain fibers are found in _ and m_ membranes
SKIN & MUCOUS MEMBRANES (sharp pain)
Slow pain fibers are found deep in _
body organs (dull pain)
REFERRED pain is when pain is felt in a _ part of the body
different
True source of pain can be difficult to identify b/c sensory impulses from DIFFERENT areas travel to brain over _ pathway
same
Special senses include (SHEV)
s_
h_
e_
v)
smell
hearing
equllibrium
vision
GUSTATION = sense of _
taste
Taste buds for around the P_ on the tongue. INVOLVES facial, vagus, glossopharyngeal nerve
PAPILLAE (protusions)
OLFACTION = sense of _
Olfactory receptors found in e_ tissue that lines the roof of n_ cavity
Involves NERVE1 (olfactory)
Smell
ephithileal tissue
nasal cavity
Structure of OUTER EAR
- The visible part of the outer ear is the a___ (or pinna)
- The opening of the auditory canal is the a_ MEATUS (or external auditory)
- The part that lines the canal and produces cerumen is the c_ g_
- AURICLE (outer part)
- ACOUSTIC MEATUS (or external auditory)
- CERUMEN gland
Structure of MIDDLE EAR
- The t_ membrane (eardrum) separates outer ear from middle ear
- The MALLEUS, INCUS, and STAPES are the auditory bones that connect the e_ to the o_window
- Auditory or EUSTACHIAN TUBE is the passage from mid ear to NASApharynx to equalize p_ on both sides of tympanic membrain
- TYPANIC MEMBRANE (eardrum)
- Connect EARDRUM to OVAL WINDOW
- equalize pressure
Structure of INNER EAR
- Canals and vestibules are FLUID-filled structures that help maintain e_ (or balance)
- Fluide filled structure for hearing (including Corti organ) is called the C_
- equilibrium (or balance)
- Cochlea
Semiscircular canals detect d_ equilabrium ( head movement)
DYNAMIC equilabrium
VESTIBULES detect S_ equalibrium (head not moving)
STATIC equilibrium
palPEbrae is another name for _
eyelids
ConJUNCtiva is a transparent mucous membrane that lines the _ surface of the eye and the a_ surface of the eyeball.
CONJUNCTIVA keeps eyeball m_
lines INNER surface of eyeLID
ANTERIOR surface of eyeBALL
keeps eyeball MOIST
Tarsal glands are found at the e_ of the eye. THey secrete _ to slow evaporation of tears and form seal when eyes closed
at EDGE of eye
secrete OIL
LACRIMAL PUNCTUM are p_ found at the END of the lacrimal canal (DRAIN TEARS)
PORES to train tears
LACRIMAL GLANDS are found _ the eye. They secrete _.
found ABOVE eye
secrete TEARS
NASOlacrimal duct is the passageway that carries _ into the n_ cavity
TEARS into NASAL cavity
1 = FIBROUS outer layer includes the white of the eye (called the s_) which contains PAIN RECEPTORS
3 TISSUE LAYERS OF EYE
SCHLERA
2 = VASCULAR Middle Layer which includes
3 TISSUE LAYERS OF EYE
a) the I_ (ring of muscle to dilate pupil)
b) CILIARY B_
c) CHO_ - vascular layer
Iris
Ciliary BODY
CHOROID
The OPTIC DISC OF RETINA
-the point where NERVE FIBRES leave the retina and converge to become the o_ n_
also where blood vessels enter/leave eye
optic nerve
ANTERIOR cavity of eye is filled with a_ humour
and
is between the l_ and the c_
aqueous humor
lens and cornea
LENS of EYE is a disc of t_ that changes s_ for NEAR & FAR vision
tissue
changes SHAPE
POSTERIOR cavity is filled with v- humour and is b_ the lens
VITREOUS humor
BEHIND the lens
PROCESS OF VISION
- LIGHT focuses on R_ and produces an image that is u__
- R_ and C_ convert image to NERVE IMPULSES
- Impulses are transmitted to b_
- retina
upside down - rods and cones
- brain
The bending of light rays so they focus precisely on retina is called _
REFRACTION
