Biology, Eighth Edition (Raven)

Chapter 9: Cell Communication

Learning Outcomes

• Know what receptor proteins are, where they are located, and what they do.
• Describe the four types of cell signaling.
• Differentiate between intracellular receptors and cell surface receptors in terms of function.
• Know the three cell surface receptor superfamilies, the basic structures of each and how each functions to convert an extracellular signal to an internal one.
• Understand how cAMP and calcium function as second messengers and why they are necessary.
• Explain the amplification process associated with protein kinase cascades.
• Know what cell surface markers are, where they are located, and give examples.
• Describe the three primary kinds of junctions that exist between cells.
• Compare and contrast communicating junctions, gap junctions, and plasmodesmata.