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sensation is awarness of the environment
Adaptation is when receptors respond less to prolonged stimulation
Pain is an unpleasant sensation due to real or potential damage
Proprioception is subconscious awarness of body position
Olfaction is smell
Gustation is taste
Audition is hearing
1.What senses are not subject to adaptation?
2. Why is this desireable?
- 1.vision, pain and proprioception(subconscious awareness of body position)
. for survival
List General Senses & receptor type that serve each one
- Temperature sensation--> thermoreceptors
- Pain--> nociceptor
- Proprioception--> proprioceptor
List Special senses & receptor type
- Olfcation(smell)--> chemoreceptors
- Gustation(taste)--> chemoreceptors
- Vision--> photoreceptor
- Audition(hearing)--> mechanoreceptors& proprioceptor
What is the purpose of pain?
Location & function of cornea?
Cornea is located anterior transparent and it refract light
Location & function of aqueous humor?
Aqueous humor is located in anterior cavity and it nourish cornea & lens
Location & function of iris?
The iris is located anterior to lens and it regulates light passage through pupil
Location & function of lens?
Lens is posterior to iris & pupil & it refracts(bends) light to focus image on retina
Location & function of vitreous humor?
Vitreous humor is in posterior cavity & it maintains eye shape
Location & function of choroid?
Choroid is located between sclera & retina and provides oxygen and nourishment to the outer layers of the retina.
Location & function of retina?
Retina is located in the innner posterior layer & it makes image formation
What is accommodation and what is it's purpose?
Accommodation is the buldging of lens. It's purpose is to focus near objects.
What is photopigment? Two structures that contain it?
Photopigment is molecule that absorbs light, changes structure, and produces a potential (impulse).
Rod and Cone contain photopigment
Functions of rod & cone photoreceptor neurons?
- Rod photoreceptor neuron-->dark vision & shape detection
- Cone photoreceptor neuron--> light vision, sharpness, color
Three major divisions of the ear & structures within each one?
- Outer Ear--> pinna-->ext. auditory canal
- Middle Ear--> tympanic membrane--> ossicles
- Inner Ear--> cochlea & vestibule & semicircular canals
What is the function of the tympanic membrane and ossicles?
What senses are mediated by cochlea, vestibule, and semicircular canals?
- Cochlea--> hearing
- Vestibule & semicircular canals--> balance