What organic molecule provides stability for the cell membrane?
What organic molecule provides stability for the cell membrane?
BIO 110 Chapter 3
| Question | Answer |
|---|---|
| Name the three organic molecules that make up cell membranes. | Phospholipids, proteins, and cholesterol. |
| Provides stability for the cell membrane. | Cholesterol |
| Form pores and transporters in the cell membrane. | Protein |
| Are antigens, in combination with oligosaccharides. | Proteins |
How does the cell membrane keep the cell stable?
One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. The lipid bilayer is selectively permeable to small, nonpolar substances. Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.
What helps support the cell membrane?
Cell Membrane Proteins
- Structural proteins help to give the cell support and shape.
- Transport proteins, such as globular proteins, transport molecules across cell membranes through facilitated diffusion.
- Glycoproteins have a carbohydrate chain attached to them.
What helps maintain structural stability in the cell membrane?
Cholesterol is important in the membrane as it helps to maintain cell membrane stability and fluidity at varying temperatures. Cholesterol is bound to neighbouring phospholipid molecules via hydrogen bonds and therefore at low temperatures, reduces their packing.
What strengthens the cell membrane quizlet?
The membrane is composed of a phospholipid bilayer in which proteins are embedded (integral proteins) or associated with the cytoplasmic side (peripheral proteins). lipid molecule that stiffens and strengthens the plasma membrane and helps regulate its fluidity.
What molecule strengthens the cell membrane?
Protein filaments: Long strands of protein on the inside surface of the membrane help support and strengthen the cell membrane, forming the “cytoskeleton.” • Substances move into or out of a cell by passive or active transport.
How does cell membrane maintain homeostasis?
Cell membranes enable organisms to maintain homeostasis by regulating the materials that may enter or leave a cell. Some materials easily cross the cell membrane without the input of energy; other materials require energy input in order to cross through the cell membrane.
How does cell transport help cells maintain homeostasis?
Cell transport helps an organism maintain homeostasis because it allows for the movement of materials across the cell membrane.
What is the role of the cell membrane to control the functions of the cell to provide a firm structure for the cell to control what enters and leaves the cell?
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
How does the cell membrane help maintain homeostasis?
How do cells restrict the movement of membrane proteins?
In some cases, the mobility of membrane proteins is restricted by their association with the cytoskeleton. In other cases, the mobility of membrane proteins may be restricted by their associations with other membrane proteins, with proteins on the surface of adjacent cells, or with the extracellular matrix.
