Which is an active transport process? simple diffusion bulk filtration osmosis facilitated diffusion ion pump?
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Answered on
Correct answer is ion pump .
Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Active transport requires cellular energy to achieve this movement.
There are two types of active transport: primary active transport that uses adenosine triphosphate (ATP ), and secondary active transport that uses an electrochemical gradient.
Some examples of active transport include:
- Phagocytosis of bacteria by macrophages
- Movement of calcium ions out of cardiac muscle cells
- Transportation of amino acids across the intestinal lining in the human gut
- Secretion of proteins such as enzymes, peptide hormones, and antibodies from various cells
- Functioning of white blood cells to defend invading diseases.