awareness of the environment
receptors respond less to prolonged stimulation
unpleasant sensation d/t real or potential damage
subconscious awareness of body position
smell, mediated by chemoreceptor
- taste, mediated by chemoreceptor
- adaptation: yes
- outer ear- pinna > external auditory, canal= funnels sound
- middle ear- tympanic membrane > ossicles= amplifies sound
- inner ear-
- A. cochlea= hearing (mechanoceptor)
- B. vestibule and semicircular canals= equilibrium (proprioceptors)
Which senses are not subject to adaptation?
- a. proprioception (unconscious awareness of body position)
- b. vision
- c. pain
What are the general senses, and what receptor types do they serve?
- a. touch- thermoceptor
- b. pain- nociceptor
- c. proprioception- proprioceptor
What are the special senses? Whisch receptor type serves each one?
- a. olfacation- chemoreceptor
- b. gustation- chemoreceptor
- c. vision
What is the purpose of pain?
What is the location and function of the cornea?
anterior transparent....refracts light
What is the location and function of the aqueous humor?
anterior cavity....nourishes cornea and lens
What is the location and function of the iris?
anterior lens....regulates light passage thru pupil
What is the location and function of the lens?
posterior to iris and pupil....refracts (bends) light to focus image on retina
What is the location and function of the vitreous humor?
posterior activity....maintains eye shape
What is the location and function of the choroid?
between sclera and retina....vessels nourish retina
What is the location and function of the retina?
inner posterior....image formation
Define accomodation and what is its purpose?
bulging of lens....to focus near objects
molecule that absorbs light, changes structure, and produces a potential
What 2 structures contain photopigments?
rods and cones
What is the function of the rod photoreceptor neuron?
dark vision and shape detection
What is the function of the cone photoreceptor neuron?
light vision, sharpeness, and color
What are the 3 major divisions of the ear?
- outer ear
- middle ear
- inner ear
What is the structure of the outer ear
pinna > external auditory canal
What is the structure of the middle ear?
tympanic membrane > ossicles
what is the structure of the inner ear?
cochlea, and semicircular canals
What is the function of the tympanic membrane and ossicles?
What sense is mediated by the cochlea?
What sense is mediated by the vestibule and the semicircular canal?