Which of the following statements about cell surface receptors is incorrect?

• A. Cell surface receptors can span the entire plasma membrane connecting the exterior and interior cell environments.
• B. Once differentiated, cells cannot change the number or type of cell surface receptors that they possess.
• C. A cell has a wide range of surface receptors to allow it to respond to varying types of signals.
• D. The immune system uses ligands and cell surface receptors to provide immune support for infected tissues.

Answer: (B)

Verified step by step guidance

1. Understand the role of cell surface receptors: Cell surface receptors are proteins located on the cell membrane that allow cells to communicate with their external environment by binding to specific molecules called ligands.
2. Recognize the structure of cell surface receptors: These receptors typically span the entire plasma membrane, connecting the exterior and interior environments of the cell, allowing signal transduction to occur.
3. Consider the adaptability of cell surface receptors: Cells can indeed change the number or type of receptors they possess in response to different conditions, even after differentiation. This adaptability is crucial for responding to varying signals.
4. Evaluate the diversity of cell surface receptors: A cell has a wide range of surface receptors to respond to different types of signals, which is essential for various cellular functions and responses.
5. Examine the role of the immune system: The immune system utilizes ligands and cell surface receptors to detect and respond to infections, providing immune support to infected tissues. This interaction is vital for immune response and regulation.