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Ricardo Garcia. Period 7. The Nervous System - Coggle Diagram
Ricardo Garcia. Period 7. The Nervous System
Cranial Nerves: Conduct impulses to areas of Smell,Vision, and motor regions for bodily functions.
Major Parts and Functions of the Spinal Cord.
-Holds 31 segments that are connected to a pair of Spinal Nerves
-White matter is bundles of myelinated Fibers
-Gray Matter houses interneurons and Neurons inside cell bodies
-Functions: Sends impulses to the brain, and houses spinal reflex.
Ascending Tracts carry sensory info, Descending tracts carry motor info from brain to muscles and Glands.
Spinal Reflec controls Arc's that pass through the Spinal Cord
Compare and contrast the autonomic Nervous system.
The Autonomic Nervous system is a portion of the (PNS). It controls Visceral motor functions as well as helps maintain Homeostasis.
It also helps maintain our Heart rate, Blood Pressure, Breathing Rate, And Body Temperature.
Spinal Nerves: 31 pairs of spinal nerves arise from the Spinal cord. All except the first pair are mixed nerves.
cervicles, 12 Thoracic, 5 Lumbar, 5 Sacral, and 1 coccygeal.
Tissues.
Epitheal: Makes a protective coat which secrets and absorbs fluids.
Connective: assists Soft sections of the body and Holds structures together.
Muscular: Allows for movement
Nervous Tissue: Used Electrical Impulses to control and direct bodily activities.
Connective Tissue Covering
Epineurium: Outer covering of a nerve
Perineurium: covering around fascicles (Bundles of Nerve Fibers)
Endoneurium: Covering around individual nerve fibers.
Classification of Neurons
Multipolar Neurons: contain dendrites and one Axon that comes from cell bodies.
Bipolar Neuron: processes from cell body, A dendrite and an Axon found in the Eyes, Nose, and Ears.
Unipolar Neurons: Splits into 2 and functions as 1 Axon. Found in the Ganglia outside the CNS
Sensory Neurons: conduct impulses from the PNS to the CNS.
Neurotransmitters: Neurotransmitters are preganglionic that release Acetycholine called Cholinergic Fibers.
Most Postganglionic fibers release norepinephrine.
Disorders associated with Nervous System
Parkinson's Disease as well as Alzheimer's. Another Disorder that can be Associated with the Nervous system would be Epilepsy.
The Major Functions of the Nervous System
The Major Aspects of the Nervous system are sensory Input, Intigration, Processing, and Motor Response. Other Functions are Thinking, Moving, and Internal processes.
Major Parts and Functions of the Brain
Cerebrum: Sensory and Motor Functions.
Diencephalon: Processes sensory input, and Controls Homestatic processes.
Cerebellum: Coordinates muscular activity.
Brainstem: Controls and moniters Visceral Activities.
Major Divisions and Sub Divisions of the Nervous System.
Major: Stimulation and Action Potential
Sub Division: Salfatory conduction and Impulse conduction
Action potential and Nerve impulse
Action potential is when Neurons reach a certain Threshold.
The Neuron changes from Negative to positive which is (Depolarization).
Action potential is reached when the charge hits -55mv.
When AP is reached and return to rest. (Repolarization)
Nerve Impulse is the Period after Action potential
Limits the Frequency of Action potential.
Ensures the impulse is only transmitted in one direction (Down the Axon)
Reflex Arc
Reflex Arc occurs when The Receptor sends a signal through a Sensory or Afferent Neuron to The central nervous system and then another signal is sent through a motor neuron to the Effector (A muscle or Gland)