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W7 Physiology

Which membrane receptor acts to directly change ion permeability when stimulated? Gated-channel receptor
True or False- In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. True
True or False- If the threshold potential is surpassed, the full peak of the action potential is always reached. True
Which is true of an action potentiall? The outside of the plasma membrane is negatively charged, and the inside is positively charged.
True or False- Young children's bones have a greater risk of fracturing because of incompletely ossified bone. False
The shoulder joint is an example of a --- joint. Multiaxial, freely movable, ball and socket
Movement of the membrane potential away from zero is called? Hyperpolarization
When a current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called? Saltatory conduction
Dopamine, epinephrine, and norepinephrine as classified as: Catecholamines
Which neuron could transmit a nerve impulse the fastest? A large- diameter neuron with myelin
The fastest nerve fibers in the body can conduct impulses up to approximately--- meters per second. 130
Created by: Ttiaara
 

 



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