The link between a first messenger and a second messenger in a cell that responds to peptide hormones is usually
A) cAMP.
B) cGMP.
C) adenyl cyclase.
D) a G protein.
E) calcium ion levels.
Answer: D
The link between a first messenger and a second messenger in a cell that responds to peptide hormones is usually
A) cAMP.
B) cGMP.
C) adenyl cyclase.
D) a G protein.
E) calcium ion levels.
Answer: D