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The Nervous System :star: - Coggle Diagram
The Nervous System
:star:
central nervous system
(CNS)
receives, processes, stores, and transfers information
spinal cord
a junction of peripheral and central nervous system
can also process and act on certain information on its own via spinal reflexes, without necessarily involving the brain.
outside(whitish because of myelin sheat): white matter, neurouns in here, and these neurouns are generally myelined inside: gray matter, neurons are not myelined
brain
control of our body's function, it manages whole system with the help of other system. similar nervous system general.
HINDBRAIN
resbonsible our cordination of basic and automatic task. these tasks are quite lifesaving, primary
MIDBRAIN
responsible cordination of muscles, responsing to sensory information like sounds, touch
FOREBRAIN
responsible for processing the external sensory input and generates more complex behavior
peripheral nervous system (PNS)
includes the components of the nervous system
that lie outside the CNS.
: the sensory division
of the PNS carries
information to the brain and spinal cord
the motor division
of the PNS carries information from the CNS to other parts of the body
The somatic division
of the PNS controls skeletal muscles
controls voluntary and involuntary skeletal muscle movement. by conscious control from the brain or by an involuntary
response called a reflex
the autonomic division
of the PNS controls smooth muscles, cardiac muscles, and glands
sympathetic
norepinephrine :!:
tends to produce a unified response in all organs at once.
transmits signals that prepare the body for emergencies and situations requiring high levels of mental alertness or physical activity, such as fighting or running away from danger
increases heart rate and respiration,
raises blood pressure, and dilates the pupils. reduces blood flow to organs that do not help you cope with an immediate crisis, such as the intestines and kidneys, and inhibits less important body functions, such as digestion and production of saliva (which is why your mouth feels dry when you are anxious).
parasympathetic
acetylcholine :!:
transmits signals that lower heart rate and respiration, increase digestion, and permit defecation and urination, among other actions.