Answer:
1. Why is a plasma membrane important?
- It provides protection for the cell
2. What is the structure of the phospholipid bilayer?
- two layers of phospholipids, with a hydrophobic, or water-hating, interior and a hydrophilic, or water-loving, exterior.
3. How do molecules get in and out of a cell?
- molecules move in and out of cells down their concentration gradient through the protein channels in the cell membrane.
4. What is the difference between endocytosis and exocytosis?
Endocytosis process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane, and bringing it into the cell
Exocytosis is the process of vesicles fusing with plasma membrane and releasing the contents outside of the cell.
5. What are the differences between passive and active transport?
Active transport pushes molecules against the concentration gradient help of ATP energy
Passive Transport let molecules pass across the membrane through a concentration channel and that requires no cellular energy.
6. What happens during active transport?
Active transport is the movement of dissolved molecules in or out of a cell through the cell membrane, from an area of lower concentration to a region of higher concentration
