1. True. The plasma membrane is the outermost component of a cell that separates the cell's internal environment from the external environment.
2. False. The substances outside of the plasma membrane are extracellular, not intracellular. Intracellular refers to the substances and processes that occur within the cell.
3. True. The plasma membrane serves as a boundary that encloses and supports the cell contents, providing structure and protection.
4. True. One of the main functions of the plasma membrane is to regulate the movement of substances into and out of the cell, controlling what enters and exits the cell.
5. True. The plasma membrane can be involved in cell adhesion, allowing cells to attach to other cells or surfaces.
6. False. The intracellular contents of the cell and the extracellular contents are different. Intracellular refers to the substances and processes within the cell, while extracellular refers to substances and processes outside the cell. There are distinct differences between the two environments.