Which of the following statement(s) is/are true concerning cellular ion channels?
A. Ion channels are transmembrane proteins that form pores that can conduct ions across the plasma membrane
B. Ion channels are formed by membrane-spanning peptides that are arranged so that polar moieties line a central core
C. Ion channel proteins undergo conformational changes between open states and closed states
D. Ion channels can be blocked
Answer:A
Which of the following statement(s) is/are true concerning cellular ion channels?
A. Ion channels are transmembrane proteins that form pores that can conduct ions across the plasma membrane B. Ion channels are formed by membrane-spanning peptides that are arranged so that polar moieties line a central core C. Ion channel proteins undergo conformational changes between open states and closed states D. Ion channels can be blocked