Advanced Placement (AP) Biology Practice Exam

Which of the following types of reception is NOT one of the four studied types?

1. Hormonal reception

2. G-protein linked reception

3. Channel closing reception

4. Receptor tyrosine kinase reception

The correct answer is: Channel closing reception

The correct answer identifies that "channel closing reception" is not one of the four studied types of reception in cell signaling mechanisms. In cellular communication, the established types of reception include: 1. Hormonal reception, which involves the binding of hormones to their specific receptors, leading to a variety of physiological responses. 2. G-protein linked reception, also known as G-protein coupled receptors (GPCRs), which are a large family of receptors that activate intracellular signaling pathways through the intermediary action of G-proteins. 3. Receptor tyrosine kinase reception, which pertains to receptors that, upon binding to a ligand, phosphorylate tyrosine residues on themselves and on downstream signaling proteins, promoting a cascade of cellular responses. "Channel closing reception" is not recognized as a standard type of reception. While ion channel receptors can open or close in response to ligands, "channel closing reception" does not represent a specific mechanism commonly discussed in cell biology or AP Biology curriculum. This distinction underscores the importance of accurately naming and categorizing types of cellular communication mechanisms utilized in biological systems.