Chapter Five Review Questions.docx - Chapter Five Review...

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Chapter Five Review Questions 1. The range of human cells is 7.5 to 150 micrometers . 2. The three main cell structures are plasma membrane, cytoplasm, and the nucleus . 3. The plasma membrane is located as the outer boundary of the cell . It is a very thin sheet that is about 75 angstroms or 0.0000003-inch thick. It is made up of lipid, protein, and other molecules . 4. The cell membrane controls the movement of substances in and out of cells. The basic function is to protect the cell from its surroundings. Facilitated diffusion is used for channel proteins to help molecules move across the membrane via passive transport. These channel proteins are responsible for bringing in ions and other small molecules into the cell. Glycoprotein molecules help act as identification markers. They distinguish between normal self-cells and abnormal or non self-cells 5. Endoplasmic reticulum (ER) is network of canals and sacs extending from the nuclear envelope and may have ribosomes attached. It’s contributes to cellular protein manufacture and distribution.

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