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level: Peripheral Nervous System

Questions and Answers List

level questions: Peripheral Nervous System

Question	Answer
Functions of peripheral nervous system (PNS)	communication lines between CNS and the rest of the body
True/False: Peripheral Nervous System (PNS) contains the nerves (31 pairs of spinal nerves, 12 pairs of cranial nerves)	True.
2 major groups of Nerve fibers based on the character of the result of impulses?	Sensory (afferent): Sensory receptors => CNS Motor (efferent): CNS => effectors (muscles and glands)
Group of Nerve fibers: Carry sensory info from receptors in the skin and other organs => CNS. Cell bodies are located outside of the spinal cord.	Afferent Neurons aka Sensory neurons
Group of Nerve fibers: Carry motor info from brain => PNS. Cell bodies are located in the ventral horn of the spinal cord.	Efferent neurons aka Motor neurons
2 divisions of Motor?	Somatic nervous system (voluntary) Autonomic nervous system (involuntary)
Division of motor: Visceral efferent system = it sends motor impulses to the visceral organs. Functions automatically and continuously, without conscious effort. Regulate smooth muscle, cardiac muscle, glands.	Autonomic Nervous System
Division of motor: It is concerned with heart rate, breathing rate, blood pressure, body temperature, and other visceral activities = maintain homeostasis.	Autonomic Nervous System
Division of motor: Control skeletal muscles, voluntary	Somatic nervous system
2 subdivisions of Autonomic nervous system?	Sympathetic Parasympathetic
Subdivision of Autonomic nervous system: "Fight/flight" Activates during emergencies, exercise/vigourous physical activity Revs up body to respond to situations that upset homeostasis	Sympathetic
Subdivision of Autonomic nervous system: "Rest & digest" Reduces energy use Promotes: storage of energy, elimination of wastes, homeostasis	Parasympathetic