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Terms in this set (14)
Sympathetic division (stress)
-Prepares body for physical activity: exercise, trauma, arousal, competition, anger, or fear
--Increases heart rate, BP, airflow, blood glucose levels, etc.
--Reduces blood flow to the skin and digestive tract
--"Fight-or-flight"
Parasympathetic division
-Calms many body functions reducing energy expenditure and assists in bodily maintenance
--Digestion and waste elimination
--"Resting and digesting" state
-Prepares body for physical activity: exercise, trauma, arousal, competition, anger, or fear
--Increases heart rate, BP, airflow, blood glucose levels, etc.
--Reduces blood flow to the skin and digestive tract
--"Fight-or-flight"
Parasympathetic division
-Calms many body functions reducing energy expenditure and assists in bodily maintenance
--Digestion and waste elimination
--"Resting and digesting" state
Tympanic membrane
--Has 18 times area of oval window
--Ossicles concentrate the energy of the vibrating tympanic membrane on an area 1/18 that size
--Ossicles create a greater force per unit area at the oval window and overcome the inertia of the perilymph
--movement of oval window presses fluid around basilar membrane and places pressure on round window which coverts pressure to action potential
--Has 18 times area of oval window
--Ossicles concentrate the energy of the vibrating tympanic membrane on an area 1/18 that size
--Ossicles create a greater force per unit area at the oval window and overcome the inertia of the perilymph
--movement of oval window presses fluid around basilar membrane and places pressure on round window which coverts pressure to action potential
Retina
-Attached to eye only at optic disc (posterior exit of optic nerve) and ora serrata (anterior edge of retina)
-Pressed against rear of eyeball by vitreous humor
-Detached retina causes blurry areas of vision and can lead to blindness
-Macula lutea: patch of cells on visual axis of eye
-Fovea centralis: pit in center of macula lutea
-Blood vessels of the retina
Rod Cell- night vision
Cone Cell- day vision
-Attached to eye only at optic disc (posterior exit of optic nerve) and ora serrata (anterior edge of retina)
-Pressed against rear of eyeball by vitreous humor
-Detached retina causes blurry areas of vision and can lead to blindness
-Macula lutea: patch of cells on visual axis of eye
-Fovea centralis: pit in center of macula lutea
-Blood vessels of the retina
Rod Cell- night vision
Cone Cell- day vision