Dictionary > Endomembrane

Endomembrane

Definition
noun, plural: endomembranes
The membraneous components in a cell, i.e. nuclear envelope, endoplasmic reticulum, Golgi apparatus, lysosomes, endosomes, vesicles, and the cell membrane, acting as a single functional and developmental unit
Supplement
The endomembrane refers to the membranous components within the eukaryotic cell. These membranous components include the membranes of nucleus (i.e. nuclear envelope), endoplasmic reticulum, Golgi apparatus, lysosomes, endosomes, vesicles, and the cell membrane. It does not include the membranes of mitochondria and/or chloroplasts. The membranes of the organelles included in the endomembrane system may be related through direct contact, e.g. the nuclear envelope being connected to the endoplasmic reticulum, and the latter to the Golgi apparatus, or by indirect contact, e.g. by the transfer of membrane segments as vesicles. In general, the endomembrane system is involved in the manufacturing and distributing cellular products. However, each of these organelles performs specific functions within the cell. For instance, the endoplasmic reticulum is involved in the synthesis of various biomolecules. The Golgi apparatus is involved in the packaging of biomolecules newly synthesized from the endoplasmic reticulum. The membranes of these organelles may also vary in structure. For instance, some of them consist of two lipid bilayers (e.g. nuclear envelope) while others are comprised of only one (e.g. lysosome). Nevertheless, their membranes share the same fundamental structure in a way that they are a lipid bilayer with proteins attached or traversing the lipid bilayer.
Word origin: Greek endo- (within) + membrane
See also:

Related term(s):

  • endomembrane system


  • You will also like...

    Physiological Homeostasis
    Physiological Homeostasis

    Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

    Nephrolepis exaltata
    Vascular Plants: Ferns and Relatives

    Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..

    Genetic Mutations
    Chromosome Mutations – II

    This tutorial is a continuation of the first lesson on chromosomal mutation. Here, find out the chromosomal aberrations ..

    Stem
    Stems

    Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

    Birth Control and Contraception
    Birth Control and Contraception

    Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

    squirrel
    Animal Water Regulation

    Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

    Related Articles...

    No related articles found

    See all Related Topics