Briefly discuss the different types of transport in cells?
Answers
Answer:
There are two major types of cell transport: passive transport and active transport. Passive transport requires no energy. It occurs when substances move from areas of higher to lower concentration. Types of passive transport include simple diffusion, osmosis, and facilitated diffusion.
Answer:
Explanation:
Cell membrane is a delicate organ of the cell which regulates movement of substances into and outside the cell. The cell membrane transport occurs in two major ways like
1. Passive transport
Passive diffusion
Facilitated diffusion
Osmosis.
2. Active transport.
Sodium potassium pump
Bulk transport (phagocytosis and pinocytosis)
Cell Membrane Transport
The structure of cell membrane is designed in such a way that it does not allow free movement of substances. However, it is semipermeable due to which certain substances can still move in and out of the cell. Based on the mechanism of movement, the transport across cell membrane is classified as
Passive transport.
This is transport where the substances move from a region of higher concentration to lower concentration without the use of energy.
This is of three types like
a) Passive diffusion:
Here the solute molecules move from a region of higher concentration to the region of lower concentration. Small molecules move down the concentration gradient like
Oxygen, carbon dioxide, fatty acids diffuse by dissolving in the lipid part of the membrane.
Sodium, potassium, calcium diffuse through water filled channels.
b) Facilitated diffusion (passive-mediated transport)
This route is used by those materials which cannot diffuse across the cell membrane without some aid.
facilitated diffusion
Specialized carrier protein molecules help in moving substance from one side of the membrane to the other. When the substance molecules bind, the carrier protein changes its shape so that the molecules move to the other end of the channel in the protein.