Phenomenon of cell by which it inhibits the uncontrolled growth is :-

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks about a cellular phenomenon that inhibits uncontrolled growth. This is a crucial concept in understanding how normal cells regulate their growth compared to cancerous cells.

2. **Identifying the Phenomenon**: The phenomenon that inhibits uncontrolled cell growth is known as **contact inhibition**.

3. **Explaining Contact Inhibition**: Contact inhibition is a process where cells stop dividing when they come into contact with each other. This is a regulatory mechanism that prevents excessive cell proliferation.

4. **Mechanism of Action**: When two cells touch each other during their growth phase (proliferation), they send signals that inhibit further cell division. This means that once they are in close proximity, they will stop growing and dividing, which helps maintain normal tissue architecture and function.

5. **Importance in Cancer**: In normal cells, contact inhibition works effectively to prevent uncontrolled growth. However, in cancerous cells, this mechanism is often lost, leading to unregulated cell division and tumor formation.

6. **Conclusion**: Therefore, the phenomenon of cell by which it inhibits uncontrolled growth is called **contact inhibition**.

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