The difference between a pump and a transmembrane receptor in a signal transduction pathway is that:
Select one:
a. Receptors cannot bind to other molecules, but pumps can
b. Receptors are amphipathic, but pumps are not
c. Receptors transmit information across membranes, but
pumps transmit molecules across membranes
d. Receptors are only useful for sensory cells, but pumps are
useful for all cells