【单选题】Use the following information to answer Questions 3 and 4. You do not need to know more about parathyroid hormone or pseudohypoparathyroidism than the information given. Pseudohypoparathyroidism is a ...
A.
An intracellular transcription factor
B.
A cytoplasmic guanylyl cyclase
C.
A receptor that must be endocytosed in clathrin-coated pits to transmit its signal