Chapter 15 Flashcards
Sensory Receptors
Specialized cells that monitor specific conditions in the body or external environment.
Sensory Pathways
Deliver somatic and visceral sensory information to their final destinations inside the CNS.
Sensory pathways use what three things to deliver information?
Nerves.
Nuclei.
Tracts.
Travel from motor centers in the brain along somatic motor pathways…
Somatic Motor Commands.
Somatic motor commands use somatic motor pathways of….
Motor nuclei.
Tracts.
Nerves.
Where are Pain receptors common?
Superficial portions of the skin.
Joint Capsules.
Walls of blood cells.
Another name for Pain Receptors.
Nociceptors.
Nociceptors may be sensitive to…
Extremes of temperature.
Mechanical Damage.
Dissolved Chemicals.
Two fibers that carry painful sensations.
Type A.
Type C.
Another name for thermoreceptors.
Temperature receptors.
What are thermoreceptors?
Free nerve endings.
Where are thermoreceptors located?
The dermis.
Skeletal muscles.
the liver.
the hypothalamus.
Sensitive to stimuli that distort their cell membranes.
Mechanoreceptors.
Contain mechanically regulated ion channels whose gates open or close in response to….
Stretching.
Compression.
Twisting.
Other distortions of the membrane.
3 classes of mechanoreceptors?
Tactile receptors.
Baroreceptors.
Proprioceptors.
Type of mechanoreceptor that provides sensations of touch, pressure, and vibration.
Tactile Receptors.
Type of mechanoreceptor that detects pressure changes in the walls of blood vessels.
Baroreceptors.
Type of mechanoreceptors that monitors the positions of joints and muscles.
Proprioceptors.
2 places where chemoreceptors are located.
Carotid bodies.
Aortic bodies.
Receptors that monitor Ph, carbon dioxide, and oxygen levels in arterial blood.
Chemoreceptors.
Carry sensory information form the skin and musculature of the body wall, head, neck, and limbs.
Somatic Sensory Pathways.
3 major somatic sensory pathways.
The posterior column pathway.
The anterolateral pathway.
The spinocerebellar pathway.
Carries sensations of highly localized (fine) touch, pressure, vibration, and proprioception.
Posterior column pathway.
Spinocerebellar pathway carries what to where?
Carries proprioceptors information to the cerebellum.
