Living Environment Regents Practice Test

What is the role of receptors in cellular communication?

1. Receptors aid in DNA replication.

2. Receptors receive messages sent by other cells.

3. Receptors act as sugar storage sites.

4. Receptors produce energy for the cell.

The correct answer is: Receptors receive messages sent by other cells.

Receptors play a crucial role in cellular communication by receiving messages sent by other cells. These messages typically come in the form of signaling molecules, such as hormones or neurotransmitters, which bind to the receptors on the surface of a cell. When the signaling molecules attach to their specific receptors, they can trigger a series of biochemical reactions within the cell, leading to a specific response. This process allows cells to communicate with one another and coordinate their activities effectively, which is essential for maintaining homeostasis and responding to changes in the environment. The other options, while mentioning important cellular processes, do not accurately describe the function of receptors in communication. For instance, receptors do not directly participate in DNA replication, act as storage sites for sugars, or produce energy. Instead, their primary function is to facilitate intercellular signaling by detecting and responding to chemical signals.