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:7/11/2014)... 2014 Research and Markets has ... Market - Industry Analysis Size Share Growth Trends and ... http://photos.prnewswire.com/prnh/20130307/600769 The ... a need for high level security in both private ... such as username and passwords, tokens etc. are vulnerable ...
(Date:7/10/2014)... 2014  The American Academy of Forensic Sciences ... and Technology (NIST) and the Department of Justice ... forensic science expert members to the Forensic Science ... of the NIST,s Organization of Scientific Area Committees ... appointments made to the new FSSB that has ...
(Date:7/10/2014)... BLUE BELL, Pa. , July 2, 2014  Unisys ... The Netherlands , Unisys Nederland N.V., today announced that ... (DJI) to deliver, implement and manage a new Basic Provision ... . Unisys won the contract with a ... for identity management software. The term of the contract is ...
Breaking Biology News(10 mins):International Biometrics Technology Market - Industry Analysis Size Share Growth Trends and Forecast to 2019 2Ten Members of the American Academy of Forensic Sciences Appointed to Forensic Science Standards Board (FSSB) 2Ten Members of the American Academy of Forensic Sciences Appointed to Forensic Science Standards Board (FSSB) 3Unisys Delivers New Basic Provision Biometrics Solution to Dutch Custodial Institutions Service 2Unisys Delivers New Basic Provision Biometrics Solution to Dutch Custodial Institutions Service 3
... its wood and cottony fibers, the kapok tree now ... for decades: the notion that African and South American ... million years ago. , Research by University of Michigan ... perhaps other rainforest--trees colonized Africa after the continents split ...
... modification to successfully manipulate the growth in height of trees, ... similar to normal trees – but after several years of ... few inches. , This is a “proof of concept” that ... It opens the door to a wide variety of new ...
... that will be published online in advance of its July ... colleagues (The Salk Institute and HHMI) demonstrate that endosomes can ... animals. , "These findings will influence our thinking of the ... why cells use them as signaling compartments," noted lead author ...
Cached Biology News:The kapok connection -- Study explains rainforest similarities 2Researchers demonstrate way to control tree height 2Researchers demonstrate way to control tree height 3
Other biology definitionOther Tags