Question

why is the cell membrane said to be a semi permeable membrane​

Answer 1

Answer:

cell membrane is said to be semi permeable membrane because

Explanation:

it allows only partial entering of substances

Answer 2

$\huge\mathfrak{Answer:-}$

⭕ The fluid mosaic model of plasma membrane was given by Singer and Nicolson.

• It tells us that plasma membrane is phospholipid bilayer which acts as a barrier to the passage of molecules and ions in and out of the cell.
• It has intrinsic and extrinsic proteins.
• It has hydrphillic head at the periphery and hydrophobic tails at the middle.
• It allows selective passage of substances in and out of cell.

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