All of the following must occur before a second action potential can begin, EXCEPT
A) the Na+ and K+ ions that moved in/out of the cell must move back to their original compartments; the Na+ inactivation gate must open; and the Na+ activation gate must close.
B) the Na+ and K+ ions that moved in/out of the cell must move back to their original compartments.
C) the absolute refractory period must occur.
D) the Na+ inactivation gate must open and the Na+ activation gate must close.
E) None of the answers are correct.
B) the Na+ and K+ ions that moved in/out of the cell must move back to their original compartments.
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Membrane proteins perform all of the following functions except
A) anchoring the cell to other structures. B) binding to extracellular ligands. C) transporting solutes across the membrane. D) catalyzing chemical reactions. E) metabolizing glucose to gain energy.
What muscles originate and insert on the bones of the thoracic limb?
What will be an ideal response?
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