A) escaping any possible compression by the visceral organs B) maintaining the scrotal temperature lower than the internal body temperature C)... View Article
The number of cells in a tissue, and thus the size of that tissue, is determined not only by the rate of cell birth by division but also by the... View Article
In several cultured vertebrate cell lines, the duration of G1, and hence entry into the cell cycle, seems to depend on some threshold rate of... View Article
Growth and division are coordinated by multiple mechanisms in animal cells. The coordination of division and growth is attained in animal cells... View Article
Cells monitor the levels of the many types of nutrients in the environment and adjust their metabolism accordingly, leading to changes in growth... View Article
Several eukaryotic cells supervise the levels of different nutrients in the environment and conform their rates of growth and metabolism... View Article
Unlike yeast cells, the cells of multicellular organisms divide only when the organism as a whole needs new cells to build or maintain tissues.... View Article
Cell growth takes place in the absence of cell division for the production of large cells, namely oocytes and neurons and oocytes. However, the... View Article
In a proliferating cell population, maintenance of cell size requires that a cell doubles in mass during each cell cycle. To coordinate growth... View Article
The pace of cell division is regulated by a combination of extracellular and intracellular factors. Yeast proliferation is limited primarily by... View Article
When environmental conditions are ideal, yeast and other unicellular organisms reproduce as rapidly as possible, progressing from one cell cycle... View Article
Centrosome duplication is completely uncoupled from DNA duplication in some cell types. In the endocycling cells of Drosophila larvae, for... View Article
It is important that the cell enters mitosis with precisely two centrosomes. Cells containing abnormal numbers of centrosomes tend to have... View Article
Centrosome duplication is largely complete by the beginning of mitosis, although the new centriole is not completely finished until late mitosis.... View Article
The centrosome of animal cells is located in the cytoplasm just outside the nuclear envelope. The centrosome contains a pair of structures,... View Article
A microtubule behavior also results from the higher rate of tubulin association at the plus end than at the minus end. At some concentrations of... View Article
As all the tubulin dimers in a filament are aligned in the same way, the two ends of a microtubule are structurally different. One of the ends... View Article
The construction of a bipolar spindle in all eukaryotes is largely based on the ability of the spindle elements to organize on their own. Motor... View Article
