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It's during the "rising phase" when the membrane potential becomes more positive.
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Does action potential invole the influx of negative ions to depolarize the membrane?
First one must outflux negative ions because the inner cell membrane is already slightly negative.
Action potentials originate at the?
Action potentials are how nerve impulses are transmitted from neuron to neuron. An action potential is formed when a stimulus to the nerve cell causes the membrane to depolarize and open all of its sodium ion channels toward the threshold potential.
Involves the influx of negative ions to depolarize the membrane?
Action Potential
Does Valium depolarize or hyperpolarize a cell?
Yes it has a depolarizing effect.
What causes the separation of the cell membrane from one or more sides of the cell?
osmosis/ plasmolysis
Hyperkalemia have on the nervous system?
Hyperkalemia decrease a cell's membrane potential beyond the threshold value so it can't depolarize again.
Does action potential invole the influx of negative ions to depolarize the membrane?
First one must outflux negative ions because the inner cell membrane is already slightly negative.
Action potentials originate at the?
Action potentials are how nerve impulses are transmitted from neuron to neuron. An action potential is formed when a stimulus to the nerve cell causes the membrane to depolarize and open all of its sodium ion channels toward the threshold potential.
Where is the cell body that causes SA node cells to depolarize faster?
Dr. Poe wouldn't like you to use this site!
Involves the influx of negative ions to depolarize the membrane?
Action Potential
Does Valium depolarize or hyperpolarize a cell?
Yes it has a depolarizing effect.
What causes the separation of the cell membrane from one or more sides of the cell?
osmosis/ plasmolysis
What happens to your acetylcholine when you stumble?
from answers.com When a nerve impulse reaches an axon ending, voltage-gated calcium channels in the axonal membrane open and calcium, which is extremely low inside the cell, enters the nerve ending. The increase in calcium-ion concentration causes hundreds of synaptic vesicles to fuse with the cell membrane and expel acetylcholine into the synaptic cleft (exocytosis). The acetylcholine released at a neuromuscular junction binds reversibly to acetylcholine receptors in the muscle end-plate membrane, a postsynaptic membrane that is separated from the nerve ending by a very short distance. The receptor is a cation channel which opens when two acetylcholine molecules are bound, allowing a sodium current to enter the muscle cell and depolarize the membrane. The resulting impulse indirectly causes the muscle to contract.
What regulates passage of materials into and out of cells?
The cell membrane controls movement of materials in and out of the cell.
What causes the movement of a drug across a cell membrane into body cells?
osmosis
What chemical into the muscle cell membrane causes a temporary rush?
Acetylcholine (ACh)
What characteristics of a water molecule causes its attraction to a cell membrane?
Water molecules are polar This causes them to be attracted to the cell surface, which is also polar in nature
