Contact Inhibition and Cancer Cells

The video explains the concept of contact inhibition, a property of normal cells that prevents them from dividing uncontrollably. This property ensures that cells stop dividing once they come into contact with other cells, maintaining tissue integrity. However, when cells lose this property, they begin to divide uncontrollably, leading to cancer. This process is known as neoplastic transformation, where normal cells become cancerous due to the loss of contact inhibition.

What is the primary function of contact inhibition in normal cells?

• To stop cell division upon contact with other cells

• To promote cell growth

• To initiate cell death

• To enhance nutrient absorption

How do normal cells respond when a neighboring cell dies?

• They fill the space by dividing once

• They shrink in size

• They undergo continuous division

• They stop functioning

What is the role of mitosis in normal cells with contact inhibition?

• To increase cell death

• To reduce cell size

• To fill spaces left by dead cells

• To continuously divide

What is the outcome when a cell with contact inhibition comes into contact with another cell?

• It starts dividing rapidly

• It stops dividing

• It changes shape

• It undergoes apoptosis

What happens when cells lose the property of contact inhibition?

• They stop dividing

• They undergo controlled division

• They become dormant

• They start dividing uncontrollably

Which property is lost in cells that become cancerous?

• Cell adhesion

• Contact inhibition

• Cell motility

• Cell metabolism

What is the primary cause of cancer as discussed in the video?

• Controlled cell division

• Loss of contact inhibition

• Increased cell size

• Decreased cell metabolism

What is the result of uncontrolled cell division due to loss of contact inhibition?

• Reduction in cell size

• Increase in cell death

• Development of a tumor

• Formation of a single large cell

What is the characteristic of a tumor formed due to loss of contact inhibition?

• It consists of a few cells

• It is a single cell structure

• It is made up of many small cells

• It is composed of large cells

What is the term used to describe the transformation of normal cells into cancerous cells?

• Cell mutation

• Apoptosis

• Neoplastic transformation

• Cell differentiation