Dictionary » F » Flagellum

Flagellum

Definition

noun, plural: flagella

(biology) Long, slender, threadlike, whiplike extension of certain cells or unicellular organisms used mainly for movements (others for signal transduction).

(botany) A runner.

(entomolgy) A clavola, the whiplike portion above the basal joints in an insect antenna.


Supplement

In bacteria, the flagella are helical filaments made up of the protein, flagellin, and rotate like screws. In eukaryotes, such as in cells of animals, plants and protists, they are made up of microtubules surrounded by the plasma membrane and enable the cells to move in a whip-like fashion.

Some flagella are not used for movement but in sensation and signal transduction by various cell types, e.g. rod photoreceptor cells of the eye, olfactory receptor neurons of the nose, kinocilium in cochlea of the ear.


Word origin: Latin, diminutive of flagrum, whip.

Related forms: flagellar (adjective).
Related terms: hispid flagella, bacterial flagella.

See also: fimbria.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


What do you do when talking to creationists?

... such natural groups? I generally try to refute this by bringing up the most common "example" of irreducible complexity, the bacterial flagellum, and then telling the person that if you remove many of the parts from a flagellum, you have a structure quite similar to the toxin injector ...

See entire post
by FriarBroccoli
Sat Jan 18, 2014 2:40 am
 
Forum: Evolution
Topic: What do you do when talking to creationists?
Replies: 4
Views: 1481

What do you do when talking to creationists?

... disproves evolution. I generally try to refute this by bringing up the most common "example" of irreducible complexity, the bacterial flagellum, and then telling the person that if you remove many of the parts from a flagellum, you have a structure quite similar to the toxin injector ...

See entire post
by Dubnium105
Fri Jan 17, 2014 11:08 pm
 
Forum: Evolution
Topic: What do you do when talking to creationists?
Replies: 4
Views: 1481

Refutation of Evolution theory

... bullshit. His book is awesome (Finding Darwin's God) but a lot of his arguments are on Youtube. Try around minute 40 on this one for the bacterial flagellum stuff: https://www.youtube.com/watch?v=JVRsWAjvQSg If you're thinking "but I'm talking about the origin of life, not flagella!" ...

See entire post
by Luxorien
Mon Feb 04, 2013 10:28 pm
 
Forum: Evolution
Topic: Refutation of Evolution theory
Replies: 13
Views: 9396

Re: Theories - Origin of Life

... view of organisms, a sort of sum total of biological machines. The very icon of the ID community is presented as an outboard motor. (the bacterial flagellum). When something is designed, there is always a purpose to the design. The various parts that go into that design always grow out of that ...

See entire post
by scottie
Fri Sep 16, 2011 3:51 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 755199

Need help with an alien cell (for a plausible fiction)

... which can be found on the exterior cell membrane): - Cilia - Fine hair-like structures that allow for movement and sometimes subtance intake. - Flagellum - Tail-like structures that allow for speedy movement. - Cnidocyte - Named after the harpoon-like stinging cells in Cridarians on Earth, cnidocytes ...

See entire post
by TemporalV01D
Tue Feb 08, 2011 1:48 pm
 
Forum: Cell Biology
Topic: Need help with an alien cell (for a plausible fiction)
Replies: 3
Views: 8258
View all matching forum results

This page was last modified 08:01, 21 August 2008. This page has been accessed 79,745 times. 
What links here | Related changes | Permanent link