EXOCYTOSE Meaning and
Definition
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Exocytose refers to the process by which a cell releases substances or materials from its interior into the extracellular space through the fusion of vesicles with the plasma membrane. This process is essential for various physiological functions, including intercellular communication, the release of neurotransmitters, hormones, and other signaling molecules, as well as the removal of waste products from the cell.
During exocytose, the cargo to be released is packaged into specialized transport vesicles within the cell. These vesicles are typically formed in the Golgi apparatus or endoplasmic reticulum and contain the specific materials to be transported. When the cell receives an appropriate signal, such as a change in hormone levels or electrical stimulation, these vesicles are transported to the plasma membrane and then fuse with it, releasing their contents into the extracellular space.
The fusion process between the vesicle membrane and the plasma membrane is mediated by a complex set of proteins and enzymes. These proteins ensure that the vesicle is accurately targeted to the correct location on the plasma membrane and that the fusion occurs at the precise moment it is needed.
Exocytose plays a vital role in numerous biological processes, including synaptic transmission, hormone secretion, immune response, and the release of digestive enzymes. Its malfunction or dysregulation has been associated with various diseases, such as diabetes, neurodegenerative disorders, and certain types of cancer. Understanding the mechanisms of exocytose is therefore crucial for advancing our knowledge of cellular physiology and developing therapeutic interventions to treat related disorders.
Etymology of EXOCYTOSE
The word "exocytose" is derived from two components: "exo-" and "-cytose".
- The prefix "exo-" is derived from the Greek word "exō", meaning "out, outside". It is commonly used to indicate something that is external, outside, or beyond.
- The suffix "-cytose" is derived from the Greek word "kutōsis", meaning "a thrusting forth, a pouring out". It is derived from the verb "kutein", which means "to thrust forth, to pour out".
Therefore, combining these two components, "exocytose" refers to a process in which substances are released or secreted from a cell by means of fusion with the cell membrane, resulting in the pouring or thrusting out of the substances from the cell to the external environment.
Conjugate verb Exocytose
CONDITIONAL
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CONDITIONAL CONTINUOUS
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CONDITIONAL PERFECT
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CONDITIONAL PERFECT CONTINUOUS
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FUTURE
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FUTURE CONTINUOUS
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FUTURE PERFECT
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FUTURE PERFECT CONTINUOUS
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IMPERATIVE
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PAST
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PAST CONTINUOUS
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PAST PARTICIPLE
exocytosed
PAST PERFECT
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PAST PERFECT CONTINUOUS
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PRESENT
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PRESENT CONTINUOUS
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PRESENT PARTICIPLE
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PRESENT PERFECT
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PRESENT PERFECT CONTINUOUS
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