Nervous System I Flashcards
What is neurology?
Branch of science that deals with the normal functioning and disorders of the nervous system
What is perception?
Awareness of your environment
What are receptors?
Specialized cells on and in the body that receive stimuli
What is the basis of the nervous system?
- ) Reception-ability to receive stimuli
- ) Interpretation
- ) Response
What does the Central Nervous System (CNS) consist of?
Brain and spinal cord
What does the Peripheral Nervous System (PNS) consist of?
All nerves stemming from the CNS
What are afferent nerves?
Sensory
Conduct impulses toward CNS
What are efferent nerves?
Motor
Conduct impulses away from CNS
What are mixed nerves?
Both efferent and afferent
What are spinal nerves?
Large nerves that stem from spinal cord (31 pair)
What are cranial nerves?
Large nerves that stem from the brain
12 pair
What does the free-nerve ending receive?
Pain
What does Meissner’s Corpuscle receive?
Touch (tactile)
What does the Pacinian Corpuscle receive?
Pressure
What does Krause’s end bulb receive?
Cold
What does Ruffini’s end organ receive?
Heat
What are exteroceptors?
Receptors found at or near the surface of the body-cutaneous receptors, taste, hearing, sight, smell
What are teloreceptors?
Receptors that can be stimulated from a distance
Do not rely on contact (cold, heat, sight, smell, hearing)
What are proprioceptors?
Receptors found in muscles, bones, joints, tendons, and ligaments
What are interoceptors?
Receptors found in internal organs (hunger, thirst, stomach ache)
How can someone differ between slight pain and severe pain?
- Type of receptor stimulated
- # of receptors stimulated
- Frequency of the repetitive discharge to the brain
What are effectors?
Muscles or glands put into action as a result of a stimulus
What is a neuron?
Nerve cell
Anatomical and functional unit of the nervous system
Carries impulses from one part of the body to another
Describe the cell body of a neuron.
Nucleus
Neuroplasm
Nissl Bodies (thought to function in metabolism)
