Question

Assertion: Plasma membrane acts as a mechanical barrier.

Reason: It protects the internal contents of the Cell.​

Answer 1

Answer:

A mechanical barrier is any thing which obstructs and prevents the entry of external agents like pathogens, etc, inside the cells. Plasma membrane or cell membrane is a mechanical barrier which protects the internal contents of the cell.

Answer 2

Both the assertion and reason are correct.

• A mechanical barrier is anything that obstructs or stops external agents, such as infections, from entering cells.
• it equally serves as a mechanical barrier that protects the cell's active internal contents.
• It further governs the exchange of materials between the cytoplasm and the surrounding fluids by acting as a selective barrier between the interior and outside of the cell.