- What factors affect the cell cycle?
- What are three problems that growth causes for cells?
- What increases the rate of cell division?
- What are the internal and external factors that influence the cell cycle control system?
- What is an external signal that regulates cell division?
- What happens when a cell increases in size?
- What controls cell growth?
- What are 2 examples of external factors that influence the cell cycle?
- What causes cell division?
- What does the rate of cell division depend on?
- What cells reproduce at the slowest rate?
What factors affect the cell cycle?
The cell cycle is controlled by many cell cycle control factors, namely cyclins, cyclin-dependent kinases (Cdks) and cyclin-dependent kinase inhibitors (CKIs).
Cyclins and Cdks, which are positive regulators of the cell cycle, activate cell cycle factors that are essential for the start of the next cell cycle phase..
What are three problems that growth causes for cells?
What problems does growth cause for cells? The larger a cell becomes, the more demands the cell places on its DNA. In addition, the cell has more trouble moving enough nutrients and wastes across the cell membrane.
What increases the rate of cell division?
Growth & Repair After an injury many cells are replaced in order to repair the damage. The rate of mitosis must increase in order to produce these new cells. Similarly the rate of mitosis also increases during periods of growth, such as our development in the womb, childhood and puberty.
What are the internal and external factors that influence the cell cycle control system?
An internal factor that influences the cell cycle control system is for instance in the M phase; the cell cannot split the chromosomes until they are all aligned at the metaphase plate. An external factor could be the fibroblasts which give a signal for the cell to go past the G1 checkpoint.
What is an external signal that regulates cell division?
External factors that help regulate the cell cycle include physical and chemical signals. Example of Physical Signal: Once a cell touches another cell, it stops dividing. Example of Chemical Signal: Growth Factors is an example of chemical signal. They are a group of proteins that stimulate cell division.
What happens when a cell increases in size?
As a cell grows bigger, its internal volume enlarges and the cell membrane expands. Unfortunately, the volume increases more rapidly than does the surface area, and so the relative amount of surface area available to pass materials to a unit volume of the cell steadily decreases.
What controls cell growth?
A variety of genes are involved in the control of cell growth and division. Tight regulation of this process ensures that a dividing cell’s DNA is copied properly, any errors in the DNA are repaired, and each daughter cell receives a full set of chromosomes. …
What are 2 examples of external factors that influence the cell cycle?
External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.
What causes cell division?
Cells divide for many reasons. For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. … When organisms grow, it isn’t because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.
What does the rate of cell division depend on?
Nutrient quality can increase the population doubling rate by promoting growth and division of individual cells. This leads to increased dilution of molecules, and more frequent random partitioning of molecules between daughter cells.
What cells reproduce at the slowest rate?
Terms in this set (12)epithelial cells. are in the skin; fastest to reproduce.connective cells. the second fastest at reproducing cells; ex. … nerve cells. reproduce the slowest; rarely reproduce.muscles cells. reproduce the second slowest.gene. segment of DNA coding for a protein or RNA.Chromosome. … histone. … histone core.More items…