Nerve System 3 Flashcards
What are general senses?
Receptors spreads widely throughout the body such as skin, various organs, and joints.
Chemoreceptors?
Respond to chemical change.
What are special senses?
Receptors located in the head such as in the ears, nose, eyes, and mouth.
Pain receptors are also called ……. And they respond to?
Nociceptors, respond to tissue damage.
Thermoreptors?
Respond to change in temperature
Mechanoreptors?
Respond to mechanical forces.
Photoreceptors?
Respond to changes in light
What are sensory impulses?
Stimulation of a sensory receptor causes local change in its membrane or receptor potential
What is sensory adaptation?
The ability to ignore unimportant stimuli
Free never endings?
Sense itching, found in the most simple receptor, also common in epithelial tissue.
Tactile (meissners) corpuscles ?
Detect fine touch and are found in hairless portions of the skin, ex lips, fingertips palms, and soles.
Lamellated (Pacinian) corpuscles?
- Common in deeper dermal tissues, tendons and ligaments
* Detect heavy pressure and vibrations
Proprioception?
Sensations of body position, posture, balance, and motion Main types: • Pacinian corpuscles – in joints • Muscle spindles – in skeletal muscles* • Golgi tendon organs – in tendons*
Olfactory receptors?
- Chemoreceptors
* Respond to chemicals dissolved in liquids
Olfactory never pathway?
• Olfactory nerves olfactory bulbs olfactory tracts limbic system (for emotions) and olfactory cortex (for interpretation of smell)
