Chapter 4 Flashcards
(59 cards)
Selecting, organizing, and interpreting information from senses
Perception
Senses receiving information from environment and sending to brain
Sensation
Receptors convert outside stimulus into action potential
Transduction
Wavelength is?
Colour (Hue)
Amplitude is?
Brightness
Purity is?
Saturation (Vividness)
Protects eye and begins to focus light
Cornea
Muscle of pupil
Iris
Regulates light
Pupil
Major area of light focusing in retina
Lens
Lens ability to change shape for retina
Accommodation
Concerts light into action potential
Retina
Where receptors are located in back of the eye
Fovea
Blind spot: no receptors
Optic Disk
Images focused in front of retina (object needs to be closer)
Myopia (Nearsightedness)
Images focused behind retina (object needs to be further away)
Hyperopia (Farsightedness)
Decreased accommodation with age
Presbyopia
Night vision, 120 million cells, high sensitivity, black/white, and low resolution
Rods
Day vision, 6 million cells, low sensitively, colour, and high resolution
Cones
120 million cones convert to 1 million ganglion cells
Convergence
Respond to absolute levels of light
Rods and Cones
Respond to changes in light
Ganglion Cells
Responds to very specific stimuli
Cortex
Nerve that crosses hemispheres
Nasal Fibres