Navigation Links
Endomembrane system


The endomembrane system is the system of internal membranes within eukaryotic cells that divide the cell into functional and structural compartments, or organelles. Prokaryotes do not have an endomembrane system and thus lack most organelles.

The endomembrane system also provides a transport system, for moving molecules through the interior of the cell, as well as interactive surfaces for lipid and protein synthesis. The membranes that make up the endomembrane system are made of a lipid bilayer, with proteins attached to either side or traversing them.

The following organelles are part of the endomembrane system:

  • The plasma membrane is a lipid bilayer membrane that separates the cell from its environment and regulates the transport of molecules and signals into and out of the cell.
  • The nuclear envelope is the membrane around the nucleus of the cell.
  • The endoplasmic reticulum is a synthesis and transport organelle [the endoplasmic reticulum is an extension of the nuclear envelope].
  • The Golgi apparatus acts as the packaging and delivery system for molecules.
  • Lysosomes are the "digestive" units of the cell. They utilize enzymes to break down macromolecules and also act as a waste disposal system.
  • Vacuoles act as storage units in some cells.
  • Vesicles are small membrane-enclosed transport units that can transfer molecules between different compartments.

'"/>


(Date:11/6/2014)... -- A groundbreaking paper from a team of Florida ... of how plants could adapt to and survive environmental ... published in the latest issue of the journal ... (the complex of DNA and proteins) is organized in ... that some genes are turned on and others are ...
(Date:11/5/2014)... Santamaria, associate professor of biology in the UTSA ... in the nation selected to receive a two-year ... for Exploratory Research (EAGER). The funding supports President ... researchers to create new technology that will demystify ... complex behaviors in neuroscience are broken into the ...
(Date:11/4/2014)... amount of death at the right time might actually ... research that could help in understanding animal populations, pest ... a paper in the journal Trends in Ecology ... colleagues conclude that the kind of positive population effect ... or mortality, depends on the size and developmental stage ...
Breaking Biology News(10 mins):Maize analysis yields whole new world of genetic science 2UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3When less is more: Death in moderation boosts population density in nature 2
... critical for improving cancer survival rates. Yet, one of ... is notoriously difficult to detect in its early stages. ... lung cancer by merely shining diffuse light on cells ... study, the analysis technique--called partial wave spectroscopic (PWS) microscopy--was ...
... London, UK (October, 07, 2010) Many scientists aspire to take ... can grow organs and implants perfectly matched to each patient ... Tissue Engineering , published by SAGE-Hindawi, explains how engineering the ... working on them, can be as powerful an agent for ...
... Mont. -- Invasive plants make life tougher for farmers and ... Missouri River Basin, so why not turn the plants into ... Russian olive and saltcedar alone could supply biomass far into ... Converting invasive plants to fuel is an intriguing idea ...
Cached Biology News:Cheek swab may detect lung cancer 2Cheek swab may detect lung cancer 3Stem cells shape up to their surroundings 2Stem cells shape up to their surroundings 3Montana State, partners in 6 states consider converting invasive plants to fuel 2Montana State, partners in 6 states consider converting invasive plants to fuel 3Montana State, partners in 6 states consider converting invasive plants to fuel 4
Other biology definitionOther Tags