Question: The thin covering that all cells have is called what?

Answer: Cell membrane

Question: What is cytology?

Answer: The study of cells.

Question: Phospholipids have what two distinct ends?

Answer: Hydrophilic end that likes to be in water.

Hydrophobic end that avoids contact with water.

Question: What is the membrane model described in the text, and explain the meaning of the model’s name.

Answer: Fluid mosaic model - The lipids form a flexible (fluid) film in which proteins are embedded, making different patterns (mosaics).

Question: What characteristic of cell membranes allows for some substances to pass through them but not others?

Answer: Selectively permeable.