Histology Stains and Techniques Quiz

Common histological stain used to distinguish cell components.

Stains Golgi apparatus and reticular fibers black.

Smallest living unit capable of independent life.

Gel-like substance in cytoplasm, with proteins and enzymes.

Small, living structure within a cell with specific functions.

The cell membrane, also called the plasmalemma, is a thin barrier made up of two layers of phospholipids with embedded proteins and carbohydrates. It forms the outermost layer of the cytoplasm.

Phospholipids are the primary component of the cell membrane. They have a hydrophilic (water-loving) head and two hydrophobic (water-fearing) tails.

Membrane proteins are categorized as extrinsic (peripheral) or intrinsic (integral) proteins. They act as channels, transporters and receptors.

The glycocalyx is a carbohydrate-rich layer on the cell's outer surface. It plays a role in cell-cell recognition, and interaction with external molecules.

Under the electron microscope, the cell membrane displays a trilamellar appearance: two dark layers (electron-dense) separated by a light layer (electron-lucent).