The absorptive process that requires energy in the form of ATP is
active transport
active transport.
Active transport is a process in which cells move molecules or ions against their concentration gradient, from an area of lower concentration to an area of higher concentration. Unlike passive transport, which does not require energy, active transport requires the input of energy in the form of adenosine triphosphate (ATP).
ATP is a molecule that serves as the main energy source for cellular processes. It is produced during cellular respiration and provides the necessary energy to power various cellular activities. In the context of active transport, ATP is used by specialized transport proteins called pumps located in the cell membrane.
These pumps, such as sodium-potassium pumps or calcium pumps, use the energy from ATP to actively transport specific molecules or ions across the cell membrane against their concentration gradient. This means that they move substances from regions of lower concentration to regions of higher concentration. By doing so, active transport allows cells to selectively take up or remove specific molecules or ions, maintaining proper internal concentrations of substances.
The energy requirement of ATP in active transport allows cells to perform crucial functions, such as nutrient uptake, waste removal, and maintaining proper ion concentrations for nerve conduction and muscle contraction. Without ATP, active transport would not be possible, and cells would not be able to maintain homeostasis or perform essential physiological processes.
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