Absorption of Mineral Salts

Active Absorption

A process requiring energy where ions and nutrients are absorbed against their concentration gradient.

Passive Absorption

A process that does not require energy where ions and nutrients move along their concentration gradient.

Cytochrome Pump Theory

A mechanism where electrons are transferred through a cytochrome chain, enabling the pumping of protons across the membrane.

Proton-Anion Co-Transport

A process where protons (H⁺) and anions (A⁻) move together across the cell membrane, maintaining charge balance.

Lecithin Carrier Concept

A transport mechanism where lecithin binds to ions and facilitates their movement across the cell membrane.

Simple Diffusion Theory

The natural movement of ions from an area of high concentration to an area of low concentration without energy or carriers.

Ion Exchange Theory

A process where ions in the soil are exchanged with ions on the root surface.

Donnan Equilibrium

A state where fixed ions inside cells attract and trap oppositely charged ions from outside without energy use.

Mass Flow Theory

The movement of ions dragged along with the flow of water, particularly during transpiration.

What does the Cytochrome Pump Theory illustrate?

It illustrates how electrons are transferred in cellular processes and how protons are pumped against a concentration gradient.

What are the main mechanisms involved in Active Absorption?

Cytochrome Pump, Proton-Anion Co-Transport, and Lecithin Carrier Concept.

What is the difference between Active and Passive Absorption?

Active absorption requires energy and can occur against a concentration gradient, while passive absorption does not require energy and occurs along a gradient.

What does the acronym 'No DIM' represent regarding Passive Absorption?

No respiration rate increase, No absorption energy required, No carriers, and encompasses Diffusion theory, Ion Exchange theory, and Mass Flow theory.