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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.


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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.

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by biohazard
Wed Mar 18, 2009 2:07 pm
 
Forum: Genetics
Topic: Mitochondrion- Imprinted to DNA?
Replies: 9
Views: 453

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 ...

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by futurezoologist
Wed Mar 18, 2009 11:03 am
 
Forum: Genetics
Topic: Mitochondrion- Imprinted to DNA?
Replies: 9
Views: 453

Photosynthesis Trivia

... enzymes necessary for the fixation of carbon dioxide into energy rich glucose are located in the (A.) lysosomes (B.) ribosomes (C.) mitochondrial cristae (D.) chloroplast grana (E.) chloroplast stroma 15. The anabolic process in which sunlight energy and water are utilized and molecular oxygen ...

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by vstexas09
Mon Oct 13, 2008 12:46 am
 
Forum: Cell Biology
Topic: Photosynthesis Trivia
Replies: 5
Views: 4295

Re: What is the primary energy source for cells?

... and like the nucleus have a double membrane. The outer membrane is fairly smooth. But the inner membrane is highly convoluted, forming folds (cristae) as seen in the cross-section, above. The cristae greatly increase the inner membrane's surface area. It is on these cristae that food (sugar) ...

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by MichaelXY
Thu Mar 20, 2008 6:30 pm
 
Forum: General Discussion
Topic: What is the primary energy source for cells?
Replies: 14
Views: 2356

ATP

... is an enzymatic process and occurs in cytoplasm 2. chemiosmosis involves proton-motive force driven ATP synthase and occurs in mitochondria cristae, thylocoid membrane of chloroplast, and cell membrane of some bacteria Also feel free to ask me through my website.

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by Cat
Tue Mar 11, 2008 1:57 am
 
Forum: Cell Biology
Topic: ATP
Replies: 11
Views: 1194
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