Dictionary » C » Cristae

Cristae

Definition

noun, singular: crista

(cell biology)

The infoldings or inward projections of the inner membrane of the mitochondrion, which are studded with proteins and increase the surface area for chemical reactions to occur like cellular respiration.

(anatomy)

Crests or ridges projecting from a surface, as in cristae cutis (dermal ridges on palms and soles).

(sense organ)

Sensory epithelium of the vestibular system located within the inner ear, as in cristae ampullaris that sense angular acceleration and deceleration.


Supplement

(cell biology) The cristae greatly increase the surface area on which reactions take place, e.g. electron transport chain of cellular respiration. If they were absent, the inner membrane of the mitochondrion would be reduced to a single spherical shape, and with less reaction surface available, therefore, the reaction efficiency would also be reduced.


Related phrases: crista terminalis.

See also: mitochondrion.


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



Results from our forum


Chemiosmosis

... aim, i.e. production of energy by ATPase. One can thing about it as being flipped (inside-out) in comparison to mitochondria or as analogy with cristae being stroma. One more thing that came to my mind. RuBISCO is activated by increase of Mg2+ concentration. I'm not sure how this proceeds, as ...

See entire post
by JackBean
Thu Nov 29, 2012 1:56 pm
 
Forum: Cell Biology
Topic: Chemiosmosis
Replies: 5
Views: 5536

Role of membranes in synthesis of ATP in cellular respiratio

... composed of two separate membranes, an outer and an inner membrane. The structure of the inner membrane is organized in repeated folds known as cristae, which greatly increase surface area and therefore increase efficiency of an event known as electron transport. The electron transport chain ...

See entire post
by mkbeast99
Wed Aug 15, 2012 11:12 pm
 
Forum: Molecular Biology
Topic: Role of membranes in synthesis of ATP in cellular respiratio
Replies: 1
Views: 14330

aerobic and anaerobic glucose degeneration in a cell

... this process NADH and FADH2 donate electrons to ETC Complex 1 and 2. Complex 1 uses the electrons to pump hydrogen ions (protons) across the cristae membrane creating a proton gradient. Ubiquinone (Q) transports these "spent" electrons from Complex 1 and 2 across the cristae membrane ...

See entire post
by Jesse2504
Tue Jun 23, 2009 3:43 am
 
Forum: Cell Biology
Topic: aerobic and anaerobic glucose degeneration in a cell
Replies: 2
Views: 15986

Mitochondrion- Imprinted to DNA?

... scratch". If these functions were not controlled by the host, the mitochondria might excessively multiply and kill the cell altogether. Cristae and membranes are synthesised similarly as other cellular components: by guidance of the protein folding and auxiliary proteins.

See entire post
by biohazard
Wed Mar 18, 2009 2:07 pm
 
Forum: Genetics
Topic: Mitochondrion- Imprinted to DNA?
Replies: 9
Views: 6951

Mitochondrion- Imprinted to DNA?

... of though wrong)in the mitochondrial mutants you were talking about Mistery; what determines the shape which these amino acids are packaged into(cristae, double membrane etc.) to create a mitochondrial functioning cell and for that matter what instructs the mitochondrion to undergo fission (does ...

See entire post
by futurezoologist
Wed Mar 18, 2009 11:03 am
 
Forum: Genetics
Topic: Mitochondrion- Imprinted to DNA?
Replies: 9
Views: 6951
View all matching forum results

This page was last modified 08:34, 30 July 2008. This page has been accessed 94,951 times. 
What links here | Related changes | Permanent link