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Organization of the Nervous System (REFLEX (Fast response to a change in…
Organization of the Nervous System
Created by: Aireli Luna García // A01368786
CENTRAL NERVOUS SYSTEM
CNS
Functions
Cordination of all the body's activities
Relays messages
Processes information (abot the environment) to the sipinal cord
Analyses responses
Formation
BRAIN
Control center of the body
CEREBRUM / TELENCEPHALON
Features
Largest part of the brain
2 Hemispheres connected by a bundle of nerves
Right
Creative
More developed in women
Left
Analytic
More developed in men
Functions
Carries out thought processes
Folds and grovees on its surface allow more complicated thought processes
Controls balance / posture / coordination / movement (coordinated)
MEDULLA OBLONGATA
Functions
Relays signals between the brain / spinal cord
Controls breathing / heart rates / blood pressure
PONS
Functions
Relays signals between the cerebrum / cerebellum
Controls breathing rates
HYPOTHALAMUS
Functions
Regulates body temperature / thirst / apetite / water balance
Partially regulates blood pressure / sleep / agression / fear / sexual behavior
SPINAL CORD
Features
SPINAL NERVES
Function
Process reflexes in the spinal cord
Features
Connect them with the CNS
Extend from the spinal cord to parts of the body
Protected by vertebrae
Nerve column that extends from the brain to the lower back
NERVE
Bundle of axons
REFLEX
Fast response to a change in the environment
Do not require conscious thought
Involuntary
They go only to the spinal cord / not to the brain
PERIPHERIAL NERVOUS SYSTEM
PNS
Functions
Sensory / motor neurons that carry information to / from the CNS
SOMATIC NERVOUS SYSTEM
Function
Relay information from external sensory receptors to the CNS
SOMATIC MOTOR NERVES
Functions
Relay information from the CNS to skeletal system
Generally voluntary
Some result from a reflex
AUTONOMIC NERVOUS SYSTEM
Functions
Carries impulses from the CNS to the heart / other internal organs
Responses
FIGHT-OR-FLIGHT RESPONSE
REST / DIGEST (BODY)
Features
Body responds to involuntary
Not under conscious control
SYMPATHETIC NERVOUS SYSTEM
Active in emergency / stress
Heart / breathing rates increase
PARASYMPATHETIC NERVOUS SYSTEM
Relaxed
Restores after a stressful experience
