Chapter 19, General and Special Senses Flashcards
Sensation
The constant awareness of the stimuli
Stimuli
anything that produces a response in an organism or in a cell or tissue of an organism.
How are stimuli detected
By receptors
General senses
Temperature, pain, touch, stretch, and pressure
Special senses
Gustation (taste) , olfaction vision, equilibrium, and audition(hearing)
Receptors change…
one form of energy into another
Receptors can be
Tonic or Phasic
Tonic
Responds at a fast rate
Phasic
Responds at a slow rate
Where are general sense receptors
Throughout the skin
Where are special sense receptors
Inside the complex organs in the head
What are the three things used to describe receptors?
receptor distribution, stimulus origin, modality stimulation
Somatic receptors
Found within the body wall, Receptors for chemicals, temperature, pain, touch, proprioception, and
pressure.
Visceral receptors
Found in walls of the viscera, responds to chemicals, temperature, and pressure
Exteroceptors
A receptor that receives external stimuli, found in mucous membranes like the nasal, oral, and vaginal cavities.
Interoceptors
Found in viscera walls, detects stretching, oxygen, temperature, and pressure.
Proprioceptors
Found in muscles, tendons, and joints. detects body and limb movement
Chemoreceptors
Detects specific molecules that are dissolved in the fluid
Thermoreceptors
Detects changes in temperature
Photoreceptors
Detects changes in light intensity, color, and movement of light
Mechanoreceptors
Detects physical deformation due to touch, pressure, vibration, and stretch.
Baroreceptors
Detects the pressure changes within body structures