Please answer the questions ASAP if good then Brainlest!. 1. Why is a plasma membrane important?

2. What is the structure of the phospholipid bilayer?

3. How do molecules get in and out of a cell?

4. What is the difference between endocytosis and exocytosis?

5. What are the differences between passive and active transport?

6. What happens during active transport?

1. The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. ... And those proteins which stick outside of the plasma membrane will allow for one cell to interact with another cell. The cell membrane also provides some structural support for a cell.

2. Phospholipid BilayerThe phospholipid bilayer consists of two adjacent sheets of phospholipids, arranged tail to tail. The hydrophobic tails associate with one another, forming the interior of the membrane. The polar heads contact the fluid inside and outside of the cell.

3. Substances move in and out of cells by diffusion down a concentration gradient, through a partially permeable membrane. ... This is called assisted diffusion or active transport. Osmosis is a type of diffusion but refers only to the movement of water molecules.

5. There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.

6. Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane, from a region of lower concentration to a region of higher concentration. The particles move against the concentration gradient , using energy released during respiration .

Explanation:

hope this helps

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

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explanation: