Chapter 12: Nervous Tissue Flashcards
(358 cards)
What does the central nervous system consist of?
Brain and spinal cord
What does all nervous tissue outside of the CNS make up?
Peripheral Nervous System (PNS)
What are two main components of the peripheral nervous system?
Nerves and sensory receptors
This is a bundle of hundreds to thousands of axons plus associated associated connective tissue and blood vessels that lies outside the brain and spinal cord
A nerve
There are twelve pairs of ______________________ nerves that emerge from the brain
Cranial nerves
There are 31 pairs of _________________ nerves that emerge from the spinal cord
spinal nerves
This structure of the nervous system monitors changes in the external or internal environment
Sensory receptors
What are the two divisions of the peripheral nervous system?
Motor and sensory
What is another name for the sensory division of the peripheral nervous system?
The Afferent or sensory division
What is the function of the sensory of afferent division of the PNS?
Conveys input into the CNS from sensory receptors in the body
Provides the CNS with sensory information about the somatic senses and special senses
What are the two types of senses that the sensory division of the PNS sends information about the CNS
Somatic senses and special senses
What type of senses are tactile, thermal, pain, and proprioceptive sensations?
Somatic sensations
What is type of senses are small, taste, vision, hearing and equillibrium?
Special sense
What is another name for the motor division of the PNS?
Efferent or motor division
What is the function of the motor or efferent division of the PNS?
Convey output from the CNS to effectors (muscles and glands)
What are the two types of nervous systems that the efferent or motor division of the PNS divides into?
Autonomic nervous system
Somatic nervous system
Which nervous system from the motor division of the PNS convery output from the CNS to skeletal muscles only?
The somatic nervous system (SNS)
What is the action of the somatic nervous system on the skeletal muscles?
Voluntary control
Which nervous system from the motor division of the PNS conveys output fromt eh CNS to smooth muscle, cardiac muscle and glands?
Autonomic nervous system (ANS)
What is the action of the autonomic nervous system?
Involuntary control
How is the autonomic nervous system further broken down?
Sympathetic nervous system
Parasympathetic nervous system
Fight or Flight nervous system?
Sympathetic Nervous System
Rest and Digest nervous system
Parasympathetic nervous system
What is the third branch of the autonomic nervous system?
The Enteric Nervous System (ENS)