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The Nervous System 2


What are the difference between myelinated & non-myelinated neurons? Myelinated has faster transmission, conduction & faster transfer of impulses
Why is an action potential "all or none" response? Any stimuli stronger than minimum threshold level will produce same action potential
How does the brain interpret stimulus strength? Determined by the number of action potentials and/or number of neurons activated
What are the five essential components of a reflex arc? -Sensory Receptor -Sensory Neuron -Interneuron in spinal cord -Motor Neuron -Effector
Describe the components of the Peripheral Nervous System Somatic & Autonomic Nervous Systems
What is happening in the neuron membrane during the: resting period, depolarization, repolarization & the refractory period during an action potential? Resting- Pump active/K+ channel "leaky" Depolarization - Na+ channel open/pump inactive Repolarization - K+ channel open/pump inactive Refractory - Pump active/K+ channel "leaky"
What is the difference between an excitatory & inhibitory response in the postsynaptic membrane? Excitatory cause PS neuron to be more permeable to Na+ Inhibitory cause PS neuron to be more permeable to K+
What are the three basic types of neurons? Sensory, Interneurons & Motor
What are the components of the forebrain Thalamus, hypothalamus & cerebrum
What are the components of the hindbrain? Medulla Oblongata, Pons & Cerebellum
What are the various neurotransmitters? What are their effects on the brain? Acetylcholine, Dopamine, Serotonin, Epinephrine/Norepinephrine, Inhibtory NTs, Endorphins - Influence the activity of the postsynaptic neuron
Created by: Carlie588