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A : The imbalance in the concentration...

A : The imbalance in the concentration of `Na^(+), K^(+)` and proteins generates the resting potential.
R : To maintain the unequal distribution of `Na^(+)` and `K^(+)`, the neurons use pumps .

A

If both the assertion and reason are true and reason is correct explanation of the assertion .

B

If both the assertion and reason are true but reason is not a correct explanation of the assertion .

C

If the assertion is true but the reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze both the assertion (A) and the reason (R) provided. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states that the imbalance in the concentration of Na⁺, K⁺, and proteins generates the resting potential. - In a neuron at rest, there is a higher concentration of sodium ions (Na⁺) outside the cell and a higher concentration of potassium ions (K⁺) inside the cell. Additionally, negatively charged proteins are present inside the neuron. - This difference in ion concentration and the presence of negatively charged proteins create a negative charge inside the neuron relative to the outside, leading to the resting membrane potential, which is typically around -70 mV. 2. **Understanding the Reason (R)**: - The reason states that to maintain the unequal distribution of Na⁺ and K⁺, neurons use pumps. - The sodium-potassium pump (Na⁺/K⁺ ATPase) actively transports 3 sodium ions out of the cell and 2 potassium ions into the cell. This active transport requires energy in the form of ATP. - This pump is crucial for maintaining the concentration gradients of Na⁺ and K⁺ across the neuronal membrane, which is essential for the generation and maintenance of the resting potential. 3. **Evaluating the Truth of A and R**: - Both the assertion and the reason are true statements. - The reason (R) correctly explains how the imbalance in ion concentrations (A) is maintained by the action of the sodium-potassium pump. 4. **Conclusion**: - Since both the assertion and the reason are true, and the reason provides a correct explanation for the assertion, the answer is that both A and R are true, with R being the correct explanation of A. ### Final Answer: Both assertion (A) and reason (R) are true, and R is the correct explanation of A.
To solve the question, we need to analyze both the assertion (A) and the reason (R) provided. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states that the imbalance in the concentration of Na⁺, K⁺, and proteins generates the resting potential. - In a neuron at rest, there is a higher concentration of sodium ions (Na⁺) outside the cell and a higher concentration of potassium ions (K⁺) inside the cell. Additionally, negatively charged proteins are present inside the neuron. - This difference in ion concentration and the presence of negatively charged proteins create a negative charge inside the neuron relative to the outside, leading to the resting membrane potential, which is typically around -70 mV. ...
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