sensory - touch Flashcards
Aware of
Sight Smell Sound Touch Taste
Unaware of
Body temp
Blood pressure
Muscle tension
Classification
General and special
General
Somatic (body + environment)
Visceral (internal organs)
Special
Highly localised receptors
Receptors transmit 4 types of info
Modalities/Form of sensation
Location
Intensity
Duration
Receptors: Modalities/form
Somatic - touch, pressure, pain, temp
Visceral - pain, pressure
Special - smell, taste, sight, balance, sound
Receptors: Intensity Encoded by (3)
Altering firing frequency
Recruit greater no of nerves
Nerve fibres of different thresholds
Receptors: duration
2
Phasic - stop even if stimulus continues
Tonic - adapt slowly
Receptor
Structure specialised to detect a stimulus
Specific and sensitive to 1 type stimulus
5 types of receptors
Mechanoreceptors Chemoreceptors Photoreceptors Thermoreceptors Nociceptors
Mechanoreceptors
Respond to mechanical stimuli
Compression, bending, stretching cells
Chemoreceptors
Chemicals become attached to membrane receptors
Photoreceptors
Respond to light striking receptor cells
Chemical change
Thermoreceptors
Respond to changes in temperature at site of receptor