Hormones which interact with _________________ (A) normally do not enter the target cell, but _______________________ (B) which in turn regulate cellular metabolism.

Question

( a ) cytoplasmic receptors (A), generate second messengers (e.g., cyclic AMP, Ca++ etc) (B)
( b ) cytoplasmic receptors (A), generate hormone-receptor complex (B)
( c ) membrane-bound receptors (A), generate second messengers (e.g., cyclic AMP, Ca++ etc) (B)
( d ) membrane-bound receptors (A), generate hormone-receptor complex (B)