What is passive and active uptake of ions? Give an account of the carrier mediated uptake
What is passive and active uptake of ions? Give an account of the carrier mediated uptake
Active transport is the movement of ions against a concentration gradient from a lower concentration to higher concentration, It cannot occur naturally and so enzymes and energy are required.
Passive transport is the movement of ions from a higher concentration to a lower concentration. There are different ways namely, simple diffusion, facilitated diffusion, filtration, and osmosis.It occurs by the process of entropy of the system so no additional energy is required.
Carrier mediated uptake:
Carriers do not catalyse scalar reactions such as ATP and hydrolysis. So, the transport process does not involve any chemical modification of the compounds bound to the carrier. The carriers catalyse the movement of inorganic ions and simple organic solutes across membranes. The carriers are specific in their substrates.
The carriers exhibit Michaelis-Menten kinetics that indicate conformational changes during transport. The sucrose carriers that are specifically responsible for loading of sucrose into the phloem is an example of carrier mediated ion transport..
Active transport is the movement of ions against a concentration gradient from a lower concentration to higher concentration, It cannot occur naturally and so enzymes and energy are required.
Passive transport is the movement of ions from a higher concentration to a lower concentration. There are different ways namely, simple diffusion, facilitated diffusion, filtration, and osmosis.It occurs by the process of entropy of the system so no additional energy is required.
Carrier mediated uptake:
Carriers do not catalyse scalar reactions such as ATP and hydrolysis. So, the transport process does not involve any chemical modification of the compounds bound to the carrier. The carriers catalyse the movement of inorganic ions and simple organic solutes across membranes. The carriers are specific in their substrates.
The carriers exhibit Michaelis-Menten kinetics that indicate conformational changes during transport. The sucrose carriers that are specifically responsible for loading of sucrose into the phloem is an example of carrier mediated ion transport..
