chap 5

Sensation refers to:

• The interpretation of stimuli by the brain

• The detection of external physical stimuli by sense organs

• The conscious awareness of sensory input

• The ability to perceive depth and distance

Perception is defined as:

• The physical process of detecting stimuli

• The processing, organizing, and interpreting of sensory information

• The ability to sense environmental changes

• The creation of internal mental representations

Sensory coding involves:

• The elimination of unused sensory pathways

• The transduction of sensory information into neuronal impulses

• The combination of sensory information into a single perception

• The conscious awareness of sensory stimuli

The absolute threshold is defined as:

• The smallest detectable difference between two stimuli

• The minimal level of stimulation required to detect a sensory input half the time

• The maximum level of stimulation the body can tolerate

• The point at which perception occurs

According to Weber’s law, the just-noticeable difference is based on:

• A fixed amount of difference

• The proportion of the original sensory input

• The type of sensory receptor involved

• The duration of exposure to the stimulus

Sensory adaptation is:

• The ability to enhance sensory perception

• The tendency for a sensory system to stop responding to constant stimulation

• The increase in sensitivity to stimuli after prolonged exposure

The cornea and lens are responsible for:

• Detecting sound waves

• Focusing light onto the retina

• Transmitting signals to the auditory cortex

• Filtering out excess light

Rods in the retina are primarily responsible for:

• Color vision in bright light

• Vision in low light conditions

• Fine detail resolution

• Visual perception of motion

The visual pathway includes:

• Optic nerve → optic chiasm → auditory cortex

• Retina → optic nerve → thalamus → primary visual cortex

• Cornea → lens → fovea → primary auditory cortex

• Rods → cones → optic chiasm → occipital lobe

According to trichromatic theory, color vision results from:

• The mixing of colors in the eye

• The activation of different types of cones sensitive to specific wavelengths

• The processing of visual information in the brain

• The interaction of rods and cones