Flashcards in Chapter 16 Deck (30):
Nervous system structures that detect stimuli to provide information about internal and external environments
Convert stimulus energy into electrical energy
Contain channels that open in response to stimuli other than neurotransmitters or voltage change
Modality gated channels
Stimulus we are conscious of
Form of stimulus
What is modality determined by?
Area of brain signal is sent, route of transmission
What are chemoreceptors used for?
Gustation, olfaction, concentration of molecules in internal fluids
Respond to distortion in plasma membrane
What are mechanoreceptors used for?
Touch, pressure, vibration, proprioception, equilibrium, stretch of organs
Detects change in temperature
Where are thermoreceptors located?
Light receptors in retina of the eye
What are the 2 types of photoreceptors?
Rods and cones
Dim-light and peripheral vision receptors
Respond to pain
Where on the body or environment the stimulus is originating
Area of single neurons detection
Smaller receptive field = ____ precise the perception
How strong the stimulus is
How long stimulus is present
What are some examples of tonic receptors?
Pain, light, proprioception
What are some examples of phasic receptors?
What are the 2 classifications of sensory receptors?
General and special
Located on skin and joints; provides information about pressure, pain, temperature, vibration, proprioception
Located in walls of internal organs; provides information about smooth muscle, chemical changes, temperature, and pain