Nervous System Flashcards
What is the CNS?
brain and spinal cord; controls and interprets info
What is the PNS?
nerves connecting the CNS to rest of body and environment
What is Somatic?
Subdivision of PNS; outer areas of body and skeletal muscle; voluntary
What is Autonomic?
Involuntary systems (e.g. heart, digestion)
Autonomic subdivisions?
Parasympathetic and Sympathetic
What is parasympathetic?
decreases activation during rest and recovery
What is sympathetic?
increases activation to prep for activity
Neuron?
functional unit of nervous system
Motor (efferent) neurons?
transmits nerve impulses from CNS to effector sites
Sensory (afferent) neurons?
respond to stimuli; transmit nerve impulses from effector sites to CNS.
Mechanoreceptors
sense distortion in body tissues
Nervous system functions?
Sensory, Integrative, Motor
Golgi tendon organs (GTO)
sense changes in muscular tension
Muscle spindles
sense changes in muscle length
