0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
State in which the resting potential is reversed as sodium ions rush into the neuron?
Depolarization
When does Depolarization occur?
Depolarisation occurs as ions cross the membrane of a cell or a nuron. Ions such as NA+ or K+ make depolarisation happen. Depolarisation can work on a threshold potetional such as in the heart. Threshold potetional A threshold potetional is a self- regenerating wave of electrical current depolairsation. In the hearts cells depolarisation happends when the cells of the heart are brought to a voltage threshold because of NA+ ions.Soduim NA+ is a soft, silvery-white powerderd ion. Soduim is found in sea water and also in rocks. Liquid soduim is used for depolarisation of the heart and is a clear liquid.
Is depolarisation same as relaxation?
No
What happens when a resting neuron's membrane depolarizes?
If it is sufficiently depolarized it will fire an action potential A depolarized neuron will successfully pass a message. If you have a polarized neuron will not be able to feel a burn, etc.
What will happen if hyperkalemia occurs in the electrical synapse of the SA node?
During generation of action potential, sodium and calcium ions enter from extracellular fluid to intracellular fluid. Depolarisation occurs and SA node gets stimulated. But due to more potassium ions in the synapse(outside the cell) k+ ions can't move out of the neuron to cause repolarisation of the cell membrane. So, the membrane remains in a depolarised state and the cardiac muscles remain contracted.
When the neuron is sufficiently stimulated this process occurs and triggers the action potential?
depolarization
What causes depolarisation of sarcolemma of muscle fibre?
An incoming action potential to an alpha motor neuron causes acetylcholine (Ach)release at the end plate, Ach binds to Ach receptors on the sarcolemma causing a sodium influx which causes depolarization.
When you touch something hot a neuron in your senses the temperature. which happens first?
an action potential moves along the neuron
What happens when neurotransmitters communicate an excitatory message to the postsynaptic neuron?
When neurotransmitters communicate an inhibitory message to the postsynaptic neuron:
What is the Neuron function?
The function of a neuron is to transfer messages throughout the brain. These neurons are all attached and interpret everything that happens.
When you touch something hot, a neuron in your finger senses the temperature. Which happens first?
an action potential moves along the neuron
When you touch something hot neuron in your finger senseds the temperature. Which happens first?
an action potential moves along the neuron
