If calcium levels are low, cAMP activity increases which leads
1. If calcium levels are low, cAMP activity increases which leads to synthesis and release of parathyroid hormone. cAMP acts as a(n)
A.enzyme |
B.phosphorylating agent |
C.ligand |
D.second messenger |
2. Cell surface receptors have three domains with different roles. Match each role to the domain that is responsible.
A. Extracellular domain |
B. Cytosolic domain |
C. Hydrophobic domain |
1. Binds the signaling molecule ________ | |
2. Sends conformational change through the plasma membrane ________ | |
3. Interacts with downstream signaling cascade ________ |
3. Protein phosphorylating enzymes help regulated gene expression by
A.translation |
B.moving mRNA into the cytoplasm |
C.protein activation |
D.DNA synthesis |
4. What describes transcription factors?
A.control of gene expression |
B.regulation of DNA duplication |
C.ATP into cAMP |
D.synthesis of glycogen |
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Solution: If calcium levels are low, cAMP activity increases which leads