University:
Boston University
Course:
CGS NS 201 | Biology I
Academic year:

2023
Views:

304

Pages:

1
Author:

Giselle A.

Mitochondria as energy generating organelles Liver mitochondria generally have a width of approx. 0.5 – 1.0 um and a length of approximately 3.0 um. This size is typical for type of mitochondria that is free in the cytoplasm such as in the liver, kidney and pancreas. In another network that is freedom Mitochondria are more limited, varying in shape and size more varied. In cells mitochondria are found randomly, e.g in the heart; or showing ultrastructural associations, e.g in striated muscle where mitochondria are arranged in an orderly manner in between muscle fibers and the position of mitochondria within the region spermatozoa flagellum. The number of mitochondria per cell varies greatly according to cell type, namely ranging between none (zero) up to hundreds of thousands. Colorless algae Leucothrix and itreoscilla does not have mitochondria. Spermatozoa and Certain flagellates such as Chromulina only have one mitochondria per cell; The liver has approximately 800 mitochondria per cell; some “sea urchin” (sea urchin) eggs and Chaos amoebas have up to 500,000 mitochondria per cell. In some circumstances there is a direct link between the amounts mitochondria per cell with the needs of cell metabolism. Mitochondria rotate and change shape various conformations. One mitochondria can shows changes in shape over time. On striated muscle and other cells in which mitochondria are absent free in the cytosol its structural plasticity is reduced. Plasticity and the movement of mitochondria in cells ensures the distribution of ATP throughout the cell, namely in places where ATP is needed. Mitochondria are bounded by two membranes, namely membranes outer and inner membrane. Each membrane has unit membrane characteristics. The two membranes are not continuous. The inner membrane forms cristae. Because of the structure The membrane is double so there are two mitochondria space is the space between the membrane and the matrix. Intermediate space the membrane is very narrow but the surface area is large because folding of the inner membrane.The most varied morphological structures are the cristae. In a particular cell the cristae are usually uniform and unique to the cell That. In different cell types, the shape of the cristae varies greatly different. Most mitochondria have cristae like lamellae or tubule-like. Crystals are shaped like lamellae is the most common, relatively parallel or stacked lamellae regular. For example, pancreatic and kidney mitochondria. The most varied morphological structures are the cristae. In a particular cell the cristae are usually uniform and unique to the cell That. In different cell types, the shape of the cristae varies greatly different. Most mitochondria have cristae like lamellae or tubule-like. Crystals are shaped like lamellae is the most common, relatively parallel or stacked lamellae regular. For example, pancreatic and kidney mitochondria.