Maintaining a resting membrane potential across the membrane required energy from ATP. In which of the following event, the ATPs are hydrolyzed?
Correct answer: A. Movement of Na+ ions into the neuron by Na+ pump
- A. Movement of Na+ ions into the neuron by Na+ pump
- B. Movement of Na+ions out of the neuron by Na+ gate
- C. Movement of K+ ions into the neuron by K+ pump
- D. Movement of K+ ions out of the neuron by K+ gate
Explanation
The movement of Na⁺ ions into the neuron via the Na⁺ pump requires ATP due to active transport mechanisms. ATP provides the energy necessary to move Na⁺ ions against their concentration gradient from areas of lower to higher concentration. This process ensures the maintenance of the Na⁺ gradient essential for neuronal excitability, nerve impulse transmission, and various cellular functions, including maintaining osmotic balance.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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