Multiple Choice
Which of the following statements about cochlear implants is FALSE?
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10. Cell Signaling
Introduction to Cell Signaling
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Which of the following best describes the role of a ligand in cell signaling?
A
A ligand binds to a receptor to initiate a cellular response.
B
A ligand synthesizes proteins in the cytoplasm.
C
A ligand degrades signaling molecules in the extracellular matrix.
D
A ligand acts as a membrane channel for ions.
Verified step by step guidance1
Understand the concept of cell signaling: Cell signaling is the process by which cells communicate with each other to coordinate their functions. It typically involves a signaling molecule (ligand), a receptor, and a cellular response.
Define what a ligand is: A ligand is a molecule that binds specifically to a receptor on the surface or inside a cell. This binding is highly specific and triggers a series of events leading to a cellular response.
Clarify the role of a receptor: Receptors are proteins that recognize and bind to ligands. They are often located on the cell membrane or inside the cell. The binding of a ligand to its receptor initiates signal transduction pathways.
Eliminate incorrect options: Analyze the provided options and eliminate those that do not align with the role of a ligand. For example, synthesizing proteins, degrading signaling molecules, or acting as a membrane channel are not functions of a ligand in cell signaling.
Conclude the correct role of a ligand: Based on the understanding of cell signaling, the correct description of a ligand's role is that it binds to a receptor to initiate a cellular response.
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