Final answer:
Certain molecules can cause shapechanges in the receptor leading to diminished receptor function and possible tumor growth.
Step-by-step explanation:
Changes in the receptor caused by certain molecules can lead to diminished receptor function and potentially promote tumor growth. For example, mutations in cell-surface receptor proteins can have severe consequences and play a role in cancer development. Errors in the protein structures of these receptor molecules can disrupt normal cell functioning and contribute to the malignant phenotype of cancer cells.