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Vesicle function involves arranging cellular substances that are important for different bodily processes; absorbing, storing and transporting them from cell to cell. Vesicles can actually do different types of functions within a cell relative to the type of vesicle present. Vesicles may fuse with the plasma membrane or another miniscule structure within the cell to discharge or absorb substances. This tiny subunit structure of the cell facilitates material exchange between cells by acting as a chamber of cellular chemical reaction.

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Normal vesicle function is important in cell development and various body processes, so anything that upsets this causes a wide array of health problems and medical disorders which are usually inherited. Knowing the role of the vesicle helps in a better understanding of congenital and inherited medical conditions caused by dysfunctional vesicle.

What are vesicles?

Vesicles are like tiny bubbles within a cell. They are a type of organelles or cellular organs (or little organs within a cell) present in a single cell with very specific function. Just like other organelles, vesicles are enclosed in the membrane sac which allows them to absorb and transport cellular materials. They come in different types, each performing different functions. Vesicle function proceeds smoothly because its structural makeup fittingly achieves this purpose.

  • Lipid bilayer

Vesicles are enclosed in a lipid bilayer – a thin membrane similar to plasma membrane. This similarity enables the vesicle to combine with the plasma membrane and release the materials it is carrying outside the cell boundary. Cellular materials that are stored in the vesicle provide some level of protection such that vesicle function can go on smoothly.

  • Phospholipid bilayer

Vesicles are separated from the cytoplasm by a layer or multiple layers of phospholipids. This allows the vesicles to be used in organizing essential materials needed for cellular development.  They also serve as chambers for chemical reactions involving cellular materials.

The structural composition of the vesicle also enables it to combine with other cellular organs within the cell to either release or take in substances.

How does a vesicle form?

Vesicles may occur naturally or prepared artificially. Natural vesicles form during protein absorption. Some of them are created when a portion of the membrane is squeezed off the Golgi complex or endoplasmic reticulum. A vesicle may also be a result of the cell membrane surrounding an object situated outside the cell.

On the other hand, artificial vesicles, which are referred to as liposomes, can be formed by disturbing biological membranes. Artificial vesicles are made up of natural phospholipids and chains of mixed lipids. They have been utilized in administering drugs and nutrients to treat cancer and some medical disorders.

Vesicle fusion is a vital process in vesicle function wherein the cellular organ combines with the plasma membrane or other cellular organ within the cell to let go of harmful substances or swallow up cellular materials.

What are the vesicle functions?

Vesicle function plays an important role in human cells and other multi-cellular organisms like plants and animals. Vesicles are responsible for transporting enzymes and proteins, absorbing food cells, as well as storing and releasing neurotransmitters. They are also capable of doing the job of being an organelle or a cellular organ. Each type of vesicle has specialized vesicle function.

  • Lysosomes

Lysosomes help in digestion by storing and releasing digestive enzymes which break down the food into smaller molecules so that they can be absorbed by other cells. They also serve in eliminating harmful bacteria or substances in the food cell to ensure that the cells receive nothing but the vital nutrients from the food.

  • Secretory vesicles

This type of vesicle may store both harmful and beneficial secretions and byproducts from cell reactions. Secretory vesicles particularly store neurotransmitters via synaptic vesicles sitting at the pre-synaptic terminals of neurons. These chemicals are essential in sending information from the neurons to the brain and all over the body. Hormones released by the endocrine glands are also stored in secretory vesicles before being released to the bloodstream.

  • Vacuoles

Vacuoles are involved in separating harmful materials from the cell and storing them along with waste products. They likewise destroy invading bacteria and keep the cell’s pH level and turgor pressure at the right values.

  • Transport vesicles

This type of vesicle is involved in moving protein molecules to different locations in the cell, such as from the endoplasmic reticulum to the Golgi apparatus or to other areas within or outside the cell.

Abnormalities in the vesicles may occur and could severely affect normal vesicle function.  This often leads to certain kinds of genetic disorders, such as familial infantile myasthenia gravis and mitochondrial disorders. A malfunctioning vesicle may cause problems in metabolism, digestion and a whole lot more depending on the type of vesicle affected. The function of vesicles in cell development is definitely essential for overall health.

Vesicles Pictures

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