PATHOLOGY MCQ
CELL DAMAGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
cell crowding and a decrease in surface area to volume ratio
|
|
|
cell crowding and decrease in growth hormone
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Cell cycle progression is mediated by cyclin-dependent kinases (Cdks) and their regulatory cyclin subunits. However, the driving force of cell cycle progression is growth factor-initiated signaling pathways that control the activity of various Cdk–cyclin complexes.
Detailed explanation-2: -Crowding of cells can also inhibit cell division. Another factor that can initiate cell division is the size of the cell; as a cell grows, it becomes inefficient due to its decreasing surface-to-volume ratio. The solution to this problem is to divide.
Detailed explanation-3: -The cell cycle is controlled by many cell cycle control factors, namely cyclins, cyclin-dependent kinases (Cdks) and cyclin-dependent kinase inhibitors (CKIs).
Detailed explanation-4: -Hormones. Mitogens. Size of the cell. Growing factors. Physical signals. Chemical signals. Ratio of Karyoplasmic.