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Jacqueline Morales P.1 Nervous system - Coggle Diagram
Jacqueline Morales P.1 Nervous system
major functions of the nervous system
it transmits signals between the brain & the rest of the body, plus internal organs
classification of neuros
sensory
activated by sensory input from the environment
motor
rain cell called neurons located within the spinal cord and the brain
major parts & functions of the spinal cord
cervical(neck) -lumbar(lower back)- thoracic lumbar(chest)
Motor= directs your body's voluntary muscle movements.
Sensory = monitors sensation of touch, pressure, temperature and pain.
Autonomic =regulates digestion, urination, body temperature, heart rate, and dilation/contraction of blood vessels (blood pressure).
cranial nerves
spinal nerves
Thoracic nerves.
Lumbar nerves.
Cervical nerves.
Sacral nerves.
tissues
Neuroglia
group of supportive cells for the neurons
maintain the myelin sheath, provide nutrient support
neurons
dendrites, cell body and axon
action potential & nerve impulse
electrical charge that travels along the membrane of a neuron
connective tissue coverings
the sheath that cover each fasciculus are known as perimysium, and the innermost sheath surrounding individual muscle fiber is known as endomysium
major divisions & subdivision of nervous system
Central nervous system (PNS)
Peripheral nervous system
major parts & functions of the brain
it controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, hunger and every process that regulates our body
major parts=
cerebelum
cerebrum
brain stem
neurotransmitters
signaling molecule secreted by a neuron to affect another cell across a synapse the cell receiving the signal, any main body part or target cell, may be another neuron, but could also be a gland or muscle cell
Compare/Contrast autonomic nervous system
controls heart rate, blood pressure, breathing rate, and body temo
helps keep homeostasis and responds to emotional stress
sympathetic division=active in stress emergency (flight or fight)
parasympathetic division= active in normal conditions(rest and digest)
reflex arc
=neural pathway that controls a reflex
main function=maintain a balance
sensory neurons that receive stimulation and in turn connect to other nerve cells that activate muscle cells
disorders & diseases
cerebrovascular accident=when blood flow to brain is halted
cause= increase in age & blood vessels burst
treatment= blood thinners
autism= brain disorder that makes difficult communication
cause= not well understtod & family history
medication
alzheimers disease: form of dementia associated w age
cause= hereditory & age over 60
treatment= uncurable & medication
spinal cord injury= damage to spinal cord
cause= accident/ fall
treatment= surgery
meningitis= infection in meninges surround brains
cause= tumors & fungi/ parasites
teartment= antibiotics
multiple sclerosis=autoimune disease that damages the myelin sheath
cause not well understood, hereditary
treatment= no known cure
drugs of abuse
marijuana
inhibitory neurotransmitters
slows down movement, short term memory and makes you feel relaxed
methamphetamine
dopamine neurotransmitters
highly addictive
heroine
affects inibitory and dopamine neurotransmitters
feelings= sedation, well being, and emotional attatchment
alchohol
dopamine neurotransmitters
makes user feel intense pleasure
cocain
dopamine neurotransmitters
makes you fidgety and unable to stay still
LSD
serotonin
wakefullness, evokes startle response
ecstasy
interferes with serotonin neurotransmitters
mood, sleep, perception and appetite are affected