Absoulute threshold
The nose can detect an odor from the presence of only a few molecules of substance.
The rods in the retina of the eyes are sensitive to low levels of light and movement. The cones are the ones that are sensitive to color and intensity, so the rods do not see color.
Yes, and typically one set of neurons for each set of stimuli.
A mechanoreceptor is a sensory receptor of a nerve that responds to pressure, vibration, or another mechanical stimulus. -JoshuaP
Biologically the receptor is what detects the stimulus. The nervous system works in a diagram like this: Stimulus --> Receptor --> Coordinator --> Effector --> Response e.g Hot Pan --> Thermo --> brain --> bicep muscle contracts --> hand moves away On Hand receptor from pan. In skin.
just noticeable difference
an absolute threshold
absolute threshold
The nose can detect an odor from the presence of only a few molecules of substance.
That is called "Absolute threshold"
absolute threshold
absolute threshold
to detect stimulus
Sound
A stimulus is a DETECTECTABLE change in the environment. e.g. light is a stimulus to an animal or plant if it can detect the light with a sensing eye or chemical
our senses will detect stimulus and send impulse into the integrating centre(brain) to interpret. the brain will produce appropriate response toward the stimulus to the effector. e.g when Telephone ring, the ears will detect the stimulus(sound) and the brain will produce the response to pick up the phone (copy from Yahoo answers)
They detect sensations of touch and low frequency vibration