Review Email i and then write an email to Tess identifying the first messenger that starts the signal transduction in the smooth muscle cell, the likely second messenger, and finally the cellular response caused by the cell signaling cascade. Explain why the arrows go from small to bigger. Also identify whether the receptor that starts the cell signaling pathway is in the plasma membrane or intracellular. Assignment 2 Review Email 2 and then answer the following questions:
1. Melody said that ginseng enhances erection. What effect would you expect ginseng to have on nitric oxide? Why?
2. Knowing that Melody said Viagra also enhances erection, what effect would you expect it to have on PDE5? Why?
3. If neither chemical works what protein(s) would you suspect is "broken"?