BIOL G220: Ch. 14 Flashcards
Terms and concepts from Ch. 14: Nervous Tissue
two structural subdivisions of nervous system
central nervous system
peripheral nervous system
central nervous system includes .. (2)
brain
spinal cord
peripheral nervous system includes .. (3)
cranial nerves
spinal nerves
ganglia
general functions of CNS and PNS (3)
- collecting information
- processing and evaluating information
- responding to information
collection information function
detect changes in the internal and external environment; pass the information on to the CNS
processing and evaluating information function
CNS determines the required response
responding to information function
CNS initiates nerve impulses to effectors to react to changes in the body’s environment
two functional subdivisions of nervous system
- sensory nervous system
2. motor nervous system
sensory nervous system is aka
afferent nervous system
sensory nervous system receives ____ information from ___ in the ____ and transmits it to the CNS
sensory; receptors; PNS
two subdivisions of sensory nervous system
somatic sensory
visceral sensory
somatic sensory
general senses such as touch, pain, pressure, vibration, and proprioception
visceral sensory
impulses from viscera
motor nervous system is aka
efferent nervous system
motor nervous systems sends ___ from ____ to ____ and glands
impulses; CNS; muscles
two subdivisions of motor nervous system
somatic motor
autonomic motor
somatic motor
impulses from the CNS that cause contraction of skeletal muscles
autonomic motor
impulses from CNS that regulate smooth and cardiac muscles, as well as glands
cell types within the NS (2)
neurons (nerve cells)
glial cells
neurons (nerve cells)
electrically excitable cells that initiate, transmit, and receive nerve impulses
glial cells
nonexcitable cells that support and protect the neurons
neurons are the ___ structural unit of the NS
basic
neurons conduct ___ from on part of the body to another
impulses
special characteristics of neurons (3)
high metabolic rate
extreme longevity
nonmitotic