Question

What is the biological importance of $Na^{+}$ and $K^{+}$ions in cell fluids like blood plasma?

• A. They participate in transmission of nerve signals.
• B. They regulate the number of red and white blood corpuscles in the cell.
• C. They can be present in any amount in the blood since they are absorbed by the cells.
• D. They regulate the viscosity and colour of the blood.

Answer 1

Answer: (A)

They participate in transmission of nerve signals.

Answer 2

: $Na^{+}$ and $K^{+}$ ions participate in the transmission of nerve signals, in regulating the flow of water across cell membrane.