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It inhibits the action potential from reaching threshold. This is done by blocking the Na channels not allowing it to depolarize.
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What part of a neuron would probably be affected most by the application of Novocain?
Novocain blocks calcium channels. Voltage-dependent calcium channels are a group of ion channels found in the membrane of excitable cells such as the axons of neurons and glial cells.
The membrane of the axon has the unique ability to?
Open and close it's chemical gates
When neuron is sufficiently stimulated this process starts the movement of ions across the axon membrane?
Depolavization
What effect does an action potential have on a vesicle?
It causes the vesicles (which are in the axon terminal) to move to the cell membrane at the end of the axon terminal, where they merge with the cell membrane, releasing their load of neurotransmitters into the synaptic cleft (gap), where they quickly diffuse to receptors in the post-synapticneuron's dendrites, initiating a graded potential which moves down the dendrites, along the soma,to the axon hillock where it can cause an action potential in that secondneuron.
When an action potential is initiated on a nerve cell membrane it radiates and is propagated in all directions from the point of initial stimulation?
Correct. The action potential is initiated at a specific point on the cell membrane called the axon hillock, and it then travels down the axon in one direction. Once initiated, it spreads along the entire length of the axon and can be transmitted to other neurons or muscle cells.
What is a axon hillock?
An axon hillock is a special cell body that connects an axon to a neuron. It is the last place where propagated membrane potentials are transmitted to the axon.
How does novocaine work?
Novocain is a medication that is in the local anesthetic family. Novocain works by blocking and numbing the nerve receptors in the skin, mouth, or area that is being anesthetized.
What is an axolemma?
An axolemma is the surface membrane of an axon.
What is axolemma?
An axolemma is the surface membrane of an axon.
Electrical change in the neuronal membrane that is transmitted along axon is?
Action potential is the term for an electrical change in the neuronal membrane transmitted along an axon. The axon is part of a nerve cell that conducts impulses.
When at rest the axon membrane has an electrical charge of?
When at rest, the axon membrane has a negative electrical charge inside compared to outside. This is known as the resting membrane potential and is typically around -70 millivolts.
What are the gaps called where the axon membrane is exposed?
Nodes of Ranvier
What part of a neuron would probably be affected most by the application of Novocain?
Novocain blocks calcium channels. Voltage-dependent calcium channels are a group of ion channels found in the membrane of excitable cells such as the axons of neurons and glial cells.
The junction between a motor neurons axon and the muscle cell membrane is called a neuromuscular junction or a?
The junction between a motor neruon's axon and the muscle cell membrane is called a neuromuscular junction or a myoneuraljunction?
The membrane of the axon has the unique ability to?
Open and close it's chemical gates
An action potential is a travelling change in the axon's membrane permeability resulting in a flow of?
ions
The junction between a motor neurons axon and the muscle cell membrane is called?
neuromuscular junction or myoneural junction
