Which Is the First Step in Cancer Development

question 63

Multiple Choice

Which is the first step in cancer development?

• A) uncontrolled cell division and growth
• B) cell DNA mutation
• C) invasion and destruction of surrounding tissues
• D) tumor spread
• E) increased apoptosis and tumor formation

---

Definitions:

Facilitated Diffusion

A process of passive transport, mediated by carrier proteins, allowing molecules to cross cell membranes along a concentration gradient.

Sodium-Potassium Exchange

A cellular process involving the active transport of sodium and potassium ions across the cell membrane, crucial for maintaining cellular and electrochemical functions.

Active Transport

The movement of substances across cell membranes against a concentration gradient, requiring energy.

Diffusion

The process by which molecules move from an area of higher concentration to an area of lower concentration.