A&P 4 Flashcards
What are the two main divisions of the nervous system?
Central Nervous System
Peripheral Nervous System
What makes up the Central Nervous System?
Brain and Spinal Cord
What makes up the Peripheral Nervous System?
Cranial and spinal nerves
What are the functions of the CNS?
It is the integrative and control center
What are the functions of the PNS?
It is the communication line between the CNS and the rest of the body
What are the divisions of the PNS?
Sensory and Motor divisions
What are the divisions of the motor division?
Somatic and Autonomic nervous systems
What are the divisions of the autonomic nervous system?
Parasympathetic and sympathetic nervous systems
What makes up the sensory division of the PNS?
Somatic and visceral sensory nerve fibers
What is the function of the sensory division of the PNS?
It conducts impulses from receptors to the CNS
What makes up the motor division of the PNS?
Motor nerve fibers
What is the function of the motor division of the PNS?
It conducts impulses from the CNS to the effectors
What are the effectors of the PNS?
Muscles and glands
What is the function of the Autonomic nervous system?
It conducts impulses from the CNS to cardiac muscles, smooth muscles, and glands
What is the function of the somatic nervous system?
It conducts impulses from the CNS to skeletal muscles
What neurons make up the autonomic nervous system?
Involuntary; visceral motor neurons
What neurons make up the somatic nervous system?
Voluntary; somatic motor neurons
What is the function of the sympathetic division?
It mobilizes body systems during emergency situations; fight or flight system
What are the functions of the parasympathetic division?
It conserves energy and promotes nonemergency functions
What is the function of the nervous system in general?
It communicates and controls the various physiological functions of the body
What is the function of the sensory input?
It gathers info from both external and internal environments
What is the function of the integration and control center?
It receives input from the sensory neurons and determines the appropriate response
What is the function of the motor output neurons?
It initiates the response from the integration and/or control center
What receptors do somatic sensory neurons receive information from?
Proprioceptors
Chemoreceptors
Baroreceptors