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Sense, นางสาวอารียา ตุ่นกระโทก
รหัสนิสิต 63010410118 - Coggle Diagram
Sense
A Sensory Receptor
- is specialized cells or
multicellular structures.
- collect information from
the environment.
- stimulate neurons to
send impulses along
sensory fibers to the brain.
A Sense Organ
- is a structure composed
of nervous tissue along with other tissues.
- enhance its response to a certain type of stimulus.
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Sensation, Perception and Adaptation
Sensation
- A feeling that occurs when brain becomes
aware of sensory impulse.
Perception
- A person’s view of the
stimulus the way the brain
interprets the information.
Adaptation
- This ability to ignore
unimportant stimuli.
Types of Sense
General senses
Receptors that are widely
distributed throughout the body
- Skin, various organs and joints
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Touch and Pressure Senses:
Tactile Receptors
- The most numerous type of receptor.
- Mechanoreceptors that react to stimuli:
○ Touch
○ Pressure
○ Vibration
- types
○ Unencapsulated : no CNT wrapping
○ Encapsulated : CNT wrapping
Temperature Senses
- Temperature receptors :free nerve endings
in the skin
Warm receptors
○ 25°C- 45°C (77° F - 113°F)
○ > 45°C → a burning sensation
- Clod receptors
○ 10°C - 20°C ((50°F- 68°F)
○ < 10°C → a freezing sensation
Sense of Pain
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Referred Pain
-
Pain originating in the heart may feel as if
it is coming from the skin because sensory
impulses from the heart and the skin follow
common nerve pathways to the brain.
Proprioception Sense
- Proprioceptors :
mechanoreceptors send
information to the CNS.
- Body position & the
length and tension of
skeletal muscles.
- Proprioceptors: stretch
receptors;
○ Muscle spindles
○ Golgi tendon organs
Stretch Receptors
- No sensation results
when they are stimulated.
Special senses
Specialized receptors
confined to structures in the head
- Eyes, ears, nose and mouth
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