PATHOLOGY

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PATHOLOGY MCQ

CELL DAMAGE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The rate at which a particular type of cell divides is linked to the body’s need for that cell type. Skin cells are typically exposed to more damaging conditions than are liver cells. Skin cells must be replaced more often than liver cells. Therefore, which of these statements is true?
A
Skin cells and liver cells divide at the same rate.
B
Liver cells divide more often than skin cells.
C
Skin cells divide more often than liver cells.
D
Neither skin cells nor liver cells divide.
Explanation: 

Detailed explanation-1: -Mitosis is a fundamental process for life. During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.

Detailed explanation-2: -A typical proliferating human cell divides on average every 24 h. This division timing allows cells to synchronize with other physiological processes and with the environment. The circadian clock, which orchestrates daily rhythms, directly regulates the cell division cycle and is a major synchronizing factor.

Detailed explanation-3: -Not all cells divide at the same rate. For example, neurons are a specialized type of cell in the nervous system, and they divide very rarely. By contrast, skin cells divide frequently in order to repair injuries or to replace old skin cells that have died. Similarly, cells divide at different speeds.

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