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Nervous system Natalie Esquivel period 2 - Coggle Diagram
Nervous system Natalie Esquivel period 2
major function of the nervous system - transmits signals between the brain and the rest of the body, including internal organs
major divisions and subdivisions of the nervous system - the central nervous system (CNS) & peripheral nervous system (PNS)
major subdivisions of CNS & PNS - gray & white matter, autonomic and somatic nervous systems, parasympathetic & sympathetic nervous systems
tissues - main pars of neuron include cell body, dendrites and axons
structure & function of neuroglia - provide metabolic & structural support for neurons, & maintain conditions that allow adequate functioning neurons
structure of neurons - dendrites, an axon, & cell body or soma
classification of neurons - sensory, motor, and interneurons
connective tissue covering- the connective tissue sheath covering each fasciculus is known as the perimysium, and the inntermost sheath surrounding individual muscle fiber is known as endomysium
major functions of the brain - cerebrum our cerebrum interprets sights, sounds and touches. It also regulates emotions, reasoning and learning
Cerebellum: Your cerebellum maintains your balance, posture, coordination and fine motor skills
Brainstem: Your brainstem regulates many automatic body functions.
major function of the spinal cord - The spinal cord is a long, tube-like band of tissue. It connects your brain to your lower back. Your spinal cord carries nerve signals from your brain to your body and vice versa.
THREE MAIN PARTS - cervical, thoracic, lumber
Action potential & the Nerve Impulse - an electrical charge that travels along the membrane of a neuron.
Cranial nerves- a set of 12 paired nerves in the back of your brain.
spinal nerves - mixed nerves that interact directly with the spinal cord to modulate motor and sensory information from the body's periphery
Neurotransmitters - a chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.
Reflex arc - a neural pathway that controls a reflex.
disorders - cerebrovascular, autism, alzhemeirs, spinal cord injury, meningitis, sclerosis
drugs - methamphetamine works on reward pathway, alcohol works on areas of the brain dealing with memories, cocaine works in the reward pathway, lsd is responsible for the feeling of wakefulness