The myelin sheath is a layer that forms an insulating and protective coating around nerves. This sheath is fundamental for the functioning of the nervous system.
- During neuronal firing, the part of the neuron that acts as an insulator and conductor to speed the electrical impulse as it travels down the axon is the MYELIN SHEATH.
- This myelin layer is fundamental for the efficiency and velocity of the transmission of electrical impulses along nerves.
- The damage of the myelin sheath is associated with different neuronal disorders (e.g., multiple sclerosis).
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Its the outer layer for exchanging substance in and out the cell. Thats also the reason why cell membrane are partially permiable
Answer:
The correct option is;
a. 11.21
Explanation:
The chemical equation for the reaction is;
NH₄OH ↔ NH₄⁺ + OH⁻
At the start of the reaction, we have;
NH₄OH ↔ NH₄⁺ + OH⁻
I
0.15 0 0
C 0.15 - x +x +x
The
= 1.78 × 10⁻⁵
Therefore, we have;
1.78 × 10⁻⁵ = [NH₄⁺][OH⁻]/NH₄OH = x²/(0.15 - x)
Which gives;
(0.15 - x) 1.78 × 10⁻⁵ = x²
x² + 1.78 × 10⁻⁵x - 2.67× 10⁻⁶ = 0
Factorizing the above equation online, gives;
(x + 0.00164294)(x - 0.00162514) = 0
Therefore;
x = -0.00164294, or x = 0.00162514
We use the positive result, which is x = 0.00162514 = 1.62514 × 10⁻³ = [OH⁻]
Therefore;
pOH = -log[OH⁻] = -log(0.00162514) = 2.789
pH + pOH = 14
Therefore;
pH = 14 - pOH = 14 - 2.789 ≈ 11.21089
The pH of a 0.15 M NH₄OH solution with
= 1.78 × 10⁻⁵ = 11.21.
The pH of a 0.15 M NH₄OH solution with
= 1.78 × 10⁻⁵ is approximately 11.21
Answer:
Asking questions is a uniquely powerful tool for unlocking value in organizations: It spurs learning and the exchange of ideas, it fuels innovation
Explanation: