Question

Different factors regulate cell growth and division. Cells are limited in size because they need a large surface area as compared to their volume. This ensures that materials can move into and out of the cell at adequate rates. The cell cycle is also regulated by external factors such as growth factors and internal factors such as
cyclins. These factors work together to make sure the cell enters the appropriate phase of the cell cycle at the correct time.

Answer 1

Cell length is constrained via way of means of the ratio of floor region to volume. The mobileular cycle is regulated via way of means of outside increase elements and inner cyclins.

Growth factors (GFs) are molecules that can stimulate various cellular processes such as cell proliferation, migration, differentiation, and multicellular morphogenesis during development and tissue healing.

Skin cells (Epidermal Growth Factor, EGF), Nerve cells (Nerve Growth Factor, NGF), Connective tissue or mesenchymal cells (Fibroblast Growth Factor, FGF,) Thrombus-forming cells that line blood vessels (Platelet Growth Factor, PDGF).

Cyclins are a family of proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinase (CDK) enzymes, or enzymes required for cell cycle synthesis.

Cyclins drive cell cycle events by working in concert with a family of enzymes called cyclin-dependent kinases (Cdks). Single Cdks are inactive, but upon binding to cyclins are activated and become functional enzymes capable of modifying target proteins.

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