Vesicle

Vesicle: structure and functions

A vesicle (from Latin vesicula, diminutive form of vesica - bubble or sac) is a small bubble formed by the cell membrane. They are found inside the cell and perform various functions in the body.

The structure of the vesicle is quite simple. As a rule, it is a membrane sac consisting of phospholipids and proteins. The size of vesicles can vary from several nanometers to several micrometers. They can have different shapes, their surface can be smooth or rough.

Vesicles perform various functions in the body. They can be used to transport substances within a cell or between cells. Some vesicles contain enzymes or hormones that can be released into the external environment and used by other cells.

One of the best known types of vesicles are synaptic vesicles, which are found in the terminals of neurons. They contain neurotransmitters - chemicals that transmit signals from one neuron to another. When a neuron receives an electrical impulse, synaptic vesicles release neurotransmitters into the gap between neurons (synapse), causing an electrical impulse in the next neuron. This process is called synaptic transmission.

Another type of vesicle is lysosome. They contain enzymes that destroy old or damaged cells, as well as bacteria or viruses that enter the body.

Vesicles can also be used to transport proteins and other macromolecules within the cell. They can transport proteins from the site of their synthesis to the site of their action, for example, to the cell membrane or to the nucleus.

In conclusion, vesicles are important structures in cells that perform various functions in the body. They can be used to transport substances, be released into the external environment, contain enzymes or hormones, and also participate in synaptic transmission. Due to their versatility and variety of functions, vesicles remain an object of active study in many scientific fields.

A vesicle is a small bubble that can form on the surface of the skin or mucous membrane. They can be caused by various reasons such as allergies, infections or injuries.

Vesicles can come in various sizes and shapes. They may contain fluid or pus and may be painful. If vesicles are left untreated, they can lead to serious complications such as infection or scarring.

Various methods are used to treat vesicles, including antibiotics, corticosteroids, and antihistamines. Topical treatments such as creams or ointments may also be used.

It is important to remember that vesicles can occur for a variety of reasons, so you should see a doctor for diagnosis and treatment.