Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

14. Cell Signaling

Overview of Cell Surface Receptors

Cell Biology

14. Cell Signaling

Overview of Cell Surface Receptors

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Multiple Choice

What typically occurs when a signaling molecule binds to an enzymatic membrane receptor?

The receptor's enzymatic activity is activated, leading to a cascade of intracellular signaling events.

The receptor is internalized and degraded immediately.

The receptor transports the signaling molecule into the nucleus.

The receptor releases calcium ions directly into the extracellular space.

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Verified step by step guidance

Step 1: Understand the role of enzymatic membrane receptors. These receptors are proteins embedded in the cell membrane that have enzymatic activity, typically activated upon binding to a specific signaling molecule (ligand).

Step 2: Recognize the typical response when a signaling molecule binds to an enzymatic membrane receptor. Binding often triggers a conformational change in the receptor, activating its enzymatic function, such as kinase activity.

Step 3: Learn about intracellular signaling cascades. Once the receptor's enzymatic activity is activated, it often phosphorylates downstream molecules, initiating a cascade of intracellular signaling events that regulate cellular responses.

Step 4: Eliminate incorrect options. For example, receptors are not immediately internalized and degraded upon ligand binding, nor do they transport signaling molecules into the nucleus or release calcium ions directly into the extracellular space.

Step 5: Conclude that the correct answer involves the activation of the receptor's enzymatic activity, leading to a cascade of intracellular signaling events, which is a common mechanism in cell signaling.