Intracellular Fluid: Definition And Its Tremendous Function During Transfer of Waste Products and Nutrients.

Intracellular Fluid Definition

Intracellular fluid refers to the fluid found within the cells of multicellular organisms. Consequently, intracellular fluid is retained throughout the intracellular compartments of the body. In descriptions of cellular activities, intracellular fluid is frequently referenced to as cytosol. The cytoplasm is composed of the cytosol as well as the organelles and substances found therein. Extracellular fluid, which dwells on the outside of cells in the extracellular compartment of the body, is diametrically opposed to intracellular fluid.

Intracellular Fluid Function

Numerous cellular processes and enzymes operate to transfer waste products and nutrients from the intracellular fluid to the extracellular fluid, as well as bring in new nutrients and solutes.

Related Biology Terms

  • Extracellular fluid (ECF) is a fluid that surrounds the body’s cells, but is still isolated from the outside world. 
  • Cytosol, also known as intracellular fluid, is the fluid that contains nutrients, proteins, and other substances in a cell.
  • The whole contents of a cell, including the cytosol and its related organelles and other cellular machineries, are referred to as cytoplasm.

Question and Answer

1.Molecules in the gut are digested to be used in cells all over the body. A particular nutrient is created by enzymes in the intestines. The cells in the intestines then absorb this nutrient and pass the nutrient to the bloodstream. The nutrient then travels to the capillaries, where it is forced from the bloodstream. Where is the molecule now?

  1. In intracellular fluid
  2. In extracellular fluid
  3. In the Cytosol

B is correct. While the molecule has travelled a long way, it has one more membrane to traverse before it reaches the intracellular fluid, or cytosol. Currently, the molecule is in the interstitial fluid, a part of the extracellular fluid. This fluid exists between cells of the body and serves to help transport nutrients, gases, and wastes. Intracellular fluid is separated from this fluid by the cell membranes of each individual cell.

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