Dictionary » M » Membrane

Membrane

Definition

noun, plural: membranes

(1) (biology) A thin layer of tissue covering a surface or lining a cavity, space or organ.

(2) (biology) A cell membrane.

(3) (chemistry) A thin pliable sheet of material that is permeable to substances in solution.


Supplement

A biological membrane functions by protecting the surface or bodily organ. It acts as a barrier against injurious substances. It also acts as a film or covering separating two regions. It may also connect structures or organs of an animal or a plant.


Word origin: Latin membrāna, skin, from membrum, member of the body.

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Re: Chromatin

... with one molecule of DNA into a daughter cell. For a moment, before cytokinesis, the dividing cell contains 92 chromosomes, but when the cell membrane seals up each of the daughter cells is back to 46 chromosomes (the 23 pairs, each pair consisting of a paternal and a maternal chromosome). ...

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by jonmoulton
Thu Sep 04, 2014 3:04 pm
 
Forum: Genetics
Topic: Chromatin
Replies: 2
Views: 186

Electron transport chain

The electrons are passed through molecules in the membrane, so the oxygen is not much accessible to them.

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by JackBean
Wed Jun 25, 2014 12:19 pm
 
Forum: Cell Biology
Topic: Electron transport chain
Replies: 3
Views: 645

Spontaneous formation of nuclear membrane

I have doubt regarding double membranes around nucleus. Single membrane structures may be formed spontaneously due to amphipathic nature phospholipids. But how double membrane architecture in nucleus form spontaneously after each cell division? ...

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by josem
Sun Jun 22, 2014 1:14 am
 
Forum: Cell Biology
Topic: Spontaneous formation of nuclear membrane
Replies: 1
Views: 735

Elastic cytoplasm film.

cytoplasm is liquid, so you cannot make it to form a membrane, unless you'd have two membranes holding the cytoplasm in between

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by JackBean
Tue May 13, 2014 4:50 pm
 
Forum: General Discussion
Topic: Elastic cytoplasm film.
Replies: 4
Views: 1153

Re: Elastic cytoplasm film.

It sounds like a black lipid membrane system is the sort of system you are looking for. However, the membranes are fairly unstable, so I doubt you could set one up that would last for months. http://en.wikipedia.org/wiki/Model_lipid_bilayer

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by jonmoulton
Wed May 07, 2014 6:06 pm
 
Forum: General Discussion
Topic: Elastic cytoplasm film.
Replies: 4
Views: 1153
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