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What changes occur in the neuron?
Neurons undergo depolarization and repolarization when stimulated. The sodium and potassium channels open.
What is the stage in an action potential that immediately follow depolarisation?
After depolarization repolarization occur whcih then again lead to resting potentiol
Why don't the terms depolarization and action potential mean the same thing?
Depolarization occurs when a stimulus opens sodium channels which allow more sodium to go into the membrane making it less negative and more positive (toward reaching threshold). An action potential can only occur once the membrane reaches threshold which means it has reached the level needed through depolarization. An action potential is a brief reversal in polarity of the membrane making the inside more positive and the outside more negative, the reverse occurs again once the membrane reaches resting potential.
What is depolarization of a neurotransmitter?
Depolarization stimulates the release of the neuro-transmitter from the terminal end of the neuron.
What molecules cause polarization and depolarization?
Sodium ions cause depolarization and potassium ions cause repolarization.
What changes occur in the neuron?
Neurons undergo depolarization and repolarization when stimulated. The sodium and potassium channels open.
What is the stage in an action potential that immediately follow depolarisation?
After depolarization repolarization occur whcih then again lead to resting potentiol
The greater influx of sodium ions results in what of the membrane?
depolarization
What is the name of the blood vessels that carry arterial blood into the capillary bed where filtration will occur?
loop of Henley
When is arterial aneurysm more likely?
These are most common over the age of 50 (but can occur at any age).
Why don't the terms depolarization and action potential mean the same thing?
Depolarization occurs when a stimulus opens sodium channels which allow more sodium to go into the membrane making it less negative and more positive (toward reaching threshold). An action potential can only occur once the membrane reaches threshold which means it has reached the level needed through depolarization. An action potential is a brief reversal in polarity of the membrane making the inside more positive and the outside more negative, the reverse occurs again once the membrane reaches resting potential.
What is depolarization of a neurotransmitter?
Depolarization stimulates the release of the neuro-transmitter from the terminal end of the neuron.
What is the arterial venous anastomosis?
An arterial anastomosis is when more than one artery fuses before giving rise to arterioles. An arterial anastomosis in effect provides an insurance policy for capillary beds: If one artery is compressed or blocked, the others can continue to deliver blood to the capillary bed, and dependent tissues will not be damaged. Arterial anastomoses occur in the brain, in the coronary circulation, and in many other sites as well.
In which type of bleeding is blood less likely to clot?
An arterial bleed, because the blood is flowing at a high rate of speed/pressure.
What molecules cause polarization and depolarization?
Sodium ions cause depolarization and potassium ions cause repolarization.
What is an arterial PO?
Arterial PCO2 is the mean arterial pressure 20 to 26mmhg.
What is an antonym for polarization?
Depolarization
