Question

What transports ions across the cell membrane?

Answer 1

Cell membrane:

1. The cell membrane is also known as the plasma membrane.
2. All the cells contain a cell membrane.
3. The cell membrane is made up of two phospholipid layers and separates the interior of the cell from the exterior environment.
4. A single phospholipid molecule is made up of a hydrophobic tail interior part and a hydrophilic polar head exterior part which ensures that the nonpolar tail of saturated hydrocarbons is protected from the aqueous environment.
5. The lipid bilayer is semipermeable which regulates the transport of materials entering and exiting the cell.

Transportation in Cell membrane:

1. Ions such as Na ⁺, K⁺, and Ca²⁺ transport across a cell membrane.
2. There are 2 types of cell transport, they are active and passive transport.
3. Active transport requires energy to transport molecules from lower to higher concentrations.
4. Passive transport requires no external energy molecules directly moving from higher to lower concentration.
5. There are three types of passive transport they are simple diffusion, osmosis, and facilitated diffusion.
6. Cell membrane follows the facilitated diffusion type of transport, where membrane proteins help in transportation by binding to the molecules on the surface.
7. Diffusion with the help of transport protein is known as facilitated diffusion.
8. Transport proteins transport the ions through the cell membrane.
9. Channel proteins help in making pores on the membrane and carrier proteins bind with specific ions are examples of transport proteins.