Depolarization of neuronal plasma membrane
How depolarization of the neuronal plasma membrane is produced? How does the cell come back to its original rest?
Expert
Whenever neuron receives a stimulus through the binding of the neurotransmitters to the exact receptors sodium channels open and the permeability of plasma membrane in postsynaptic region is changed. Then sodium ions enter in the cell resulting in the lowering of the membrane potential. In case, this reduction of the membrane potential arrives at a level known as the excitation threshold, or threshold potential, which is around–50 mV, the action potential is produced, that is, the depolarization intensifies up-till reaching its higher level and depolarization current is transmitted all along the remaining length of neuronal membrane. In case, the excitation threshold is attained voltage-dependent sodium channels within the membrane open enabling more sodium ions to go into the cell in favor of concentration gradient and an estimated -35 mV level of positive polarization of the membrane is attained. Then the voltage-dependent sodium channels close and more voltage-dependent potassium channels get open. Then the potassium ions go out through the cell in favor of concentration gradient and potential difference of the membrane reduces, a method known as repolarisation. The action potential triggers the similar electrical mechanism in the neighboring regions of plasma membrane and the impulse is therfore transmitted from dendrites to terminal region of the axon.
Write down the life cycle of the hookworms?
Q. Prescribed the objective of the co-ordination in the short manner Economy and efficiency: co ordination aims at be gaining about the economy and efficiency in the organization. Coordination is avoiding the
Explain the lymphatic system?
Market Research: The market research enables us to have an overview of the overall market for packed lunch boxes. It focuses mainly on the people in the market and our competitors. As we have already discussed, the people in the market are our potenti
What are the secondary lymphoid organs?
Types of Organization There are various types of organizations for the study of which an organization typology is constructed. Typology is a set of
Describe the three main parts into which a neuron can be classified? Also state their respective functions?
How are ecological interactions categorized?
Strategy Canvas Analysis Canvas strategy is the framework for action once the diagnosis strategy to build the two functions (Kim and Mauborgne, 2005). First, the latest situation in the marke
What are the different problems created due to urbanization also define Zero population growth?
18,76,764
1954125 Asked
3,689
Active Tutors
1433962
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!