#Question id: 1107
#Unit 4. Cell Communication and Cell Signaling
Viagra causes dilation of blood vessels and increased blood flow to the penis, facilitating erection. Viagra acts by inhibiting which of the following events?
#Question id: 1108
#Unit 4. Cell Communication and Cell Signaling
Which of the following amino acids are most frequently phosphorylated by protein kinases in the cytoplasm during signal transduction?
#Question id: 1109
#Unit 4. Cell Communication and Cell Signaling
What role do phosphatases play in signal transduction pathways?
#Question id: 1110
#Unit 4. Cell Communication and Cell Signaling
If a pharmaceutical company wished to design a drug to maintain low blood sugar levels, one approach might be to design a compound that does which of the following?
#Question id: 1111
#Unit 4. Cell Communication and Cell Signaling
If a pharmaceutical company wished to design a drug to maintain low blood sugar levels, one approach might be to design a compound that does which of the following?
#Question id: 1113
#Unit 4. Cell Communication and Cell Signaling
Consider this pathway:
epinephrine → G protein-coupled receptor → G protein → adenylyl cyclase → cAMP
The second messenger in this pathway is: