Английская Википедия:Biconcave disc
| Файл:Biconcave disc.svg |
A biconcave disc — also referred to as a discocyte[1] — is a geometric shape resembling an oblate spheroid with two concavities on the top and on the bottom.
Biconcave discs appear in the study of cell biology, where it is meta-stable, and involves the continuous adjustment of the asymmetric transbilayer lipid distribution, which is correlated with ATP depletion.[2]
Mathematical model
A biconcave disc can be described mathematically by
- <math>z(r) = D \sqrt{1 - \frac{4r^2}{D^2}} \left(a_0 + \frac{a_1 r^2}{D^2} + \frac{a_2 r^4}{D^4} \right)</math>
where Шаблон:Math is the height of the surface as a function of radius Шаблон:Math, Шаблон:Math is the diameter of the disc, and Шаблон:Math are coefficients describing the shape. The above model describes a smooth surface; actual cells can be much more irregular.
Biology
Erythrocytes are in the shape of a biconcave disc. An erythrocyte is also known as a red blood cell and transports oxygen to and from tissues. [1][3]
References
