Question

1. what are the 2 main functions of the plasma membrane?
2. the plasma membrane is selectively permeable. what does this mean?
3. draw a phospholipid below. label the hydrophilic head and hydrophobic tail.
4. label the 4 parts of the plasma membrane and indicate the function of each part in the diagram below.

passive and active transport
list the 3 types of passive transport and the 3 types of active transport in the chart below:

passive transport

active transport

Explanation:

1. The main functions of the plasma membrane are to provide cell - structure support and regulate the movement of substances in and out of the cell.
2. Selective permeability means the plasma membrane allows certain substances to pass through while restricting others, based on size, charge, and solubility.
3. A phospholipid has a phosphate - containing hydrophilic head and fatty - acid based hydrophobic tails. You would draw a structure with a head and two tails and label accordingly.
4. The main parts of the plasma membrane and their functions:

• Phospholipid bilayer: Forms the basic structure and acts as a barrier.
• Integral proteins: Transport molecules across the membrane, act as receptors.
• Peripheral proteins: Assist in cell - cell recognition and communication.
• Glycolipids and glycoproteins: Involved in cell - cell recognition, immune response, and adhesion.

For passive transport: diffusion, facilitated diffusion, osmosis. For active transport: primary active transport (e.g., sodium - potassium pump), secondary active transport, endocytosis and exocytosis.

Answer:

1. Structure support and regulate substance movement.
2. Allows certain substances to pass while restricting others.
3. Draw a structure with a hydrophilic head and two hydrophobic tails and label them.
4. Phospholipid bilayer: forms basic structure/barrier; Integral proteins: transport/receptor functions; Peripheral proteins: cell - cell recognition/communication; Glycolipids and glycoproteins: cell - cell recognition/immune response/adhesion.

Passive Transport: Diffusion, Facilitated Diffusion, Osmosis.
Active Transport: Primary Active Transport, Secondary Active Transport, Endocytosis and Exocytosis.