The Cell Membrane and Cell Transport Webquest

Question

Namo: Kerrk.|lightowel
Task I:nside the cel Membrane video
use any link below to watch the insides com Membrane video bu the Amoeba Sisters. As you watch, answe rievolowing questions.
1. What does the term semi-permeable mean?
2. True or False? … All types of cells have a cell membrar
3. Which part of a phospholipid is hydrophilic
4. What does the term hydrophilic mean?
5. Which part of a phospholipid is hydrophobic?
6. What does the term hydrophobic mean
7. What is the sienificance of the fluid nature of the fluid mosaic model?
8. What is the role of cholesterol in a phospholipid bilayer?
9. Where are peripheral proteins found?
10. Where are integral proteins found?
11. Which type of protein allows materials in and out of the cell?.
12. Why the roles of glycoproteins and glycolipids?
13. Label the phospholipid tail, phospholipid head, and the protein in the diagram. Is the protein shown in the diagram a peripheral protein or integral protein? How do you know?
14. Why are the heads of the phospholipid bilayer located on the outside of the membrane?

Answer 1

1. The term semi-permeable means that the cell membrane allows some substances to pass through while blocking others.
2. True. All types of cells have a cell membrane.
3. The phosphate head of a phospholipid is hydrophilic.
4. Hydrophilic means "water-loving" and refers to substances that are attracted to or soluble in water.
5. The fatty acid tails of a phospholipid are hydrophobic.
6. Hydrophobic means "water-fearing" and refers to substances that repel or are insoluble in water.
7. The fluid nature of the fluid mosaic model is significant because it allows the cell membrane to be flexible and dynamic, allowing for various cellular processes.
8. Cholesterol helps to stabilize the phospholipid bilayer by preventing the fatty acid tails from packing too closely together.
9. Peripheral proteins are found on the surface of the cell membrane, either on the inner or outer surface.
10. Integral proteins are embedded within the phospholipid bilayer, spanning across the entire membrane.
11. Transport proteins allow materials to pass in and out of the cell.
12. Glycoproteins and glycolipids serve as identification markers and are involved in cell-cell recognition and communication.
13. The phospholipid tails are the hydrophobic part of the phospholipid, the phospholipid head is hydrophilic, and the protein is labeled as an integral protein. It is an integral protein because it is embedded within the phospholipid bilayer.
14. The heads of the phospholipid bilayer are located on the outside of the membrane because they are hydrophilic and interact with the watery environment both inside and outside of the cell.