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Explain Fate of the Neurotransmitter
Postsynaptic membranes bind the neurotransmitters by an active process. The chemicals keep moving in and out of the membrane. The synapse takes care not to have a continuous indefinite action. This is brought about by enzyme degradation, re- uptake mechanisms, recycling mechanisms etc. To illustrate, acetylcholine is removed by enzymatic hydrolysis from post synaptic membrane while nor-adrenaline is removed from the synaptic cleft by catechol-o-methyl transferase. It is further partly up-taken, partly recycled and inactivated by monoamine oxidase. Neurotransmitters therefore, cross the synapse enabling impulse transmission to an adjacent neuron. Once in the synapse, they are active for only a short time - between 0.5 and 1 millisecond. Enzymes in the synapse inactivate neurotransmitters, which are either taken back into the axon (reuptake) and transported back to the neuron for re-usage or destroyed. Next, having studied about the mechanism of transmission.
how many human body systems ?
#2 DESCRIBE THE APPEARANCE OF THE STOMATE AND THE GUARD CELLS.
Explain Cell - The Basic Unit of Life You must be aware of the fact that the cell is the basic unit of life. What do you understand by the term 'cell'? What are the components
what is monera
Oxidation Weathering by oxidation is common in rocks which are rich in the elements that can be easily oxidised e.g. iron. Iron as Fe 2+ present in a mineral is oxidised to Fe
Diagnosis and Prognosis: The diagnosis and prognosis of disease were done directly by seeing, hearing, smelling and touching all external human organs and human waste and of
Rockets or Launch Vehicles: Every flight into space begins with a rocket launching. The rocket can lift a satellite or spaceship carrying human beings and equipment into space
INTRODUCTION : In this unit, we shall discuss the need and the method for reporting an accident. We shall explain the choice of locating the first aid box and state its contents.
Coenzyme : A molecule that binds to an enzyme and is essential for its activity, but is not permanently altered by the reaction. Many coenzymes are derived from vitami
Explain Sinus Bradycardia - Electrocardiogram If the SA node discharge rate is slow, the heart rate is slow. ECG is normal in every respect except that the heart rate at rest i
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