Which statement about cardiac muscle is FALSE?
A) Cardiac muscle cells use Ca2+ ions released from the sarcoplasmic reticulum.
B) Calcium-induced calcium release is when extracellular Ca2+ stimulates release of Ca2+ from the sarcoplasmic reticulum.
C) Cardiac muscle cells must obey the all-or-none law of contraction.
D) The energy demand of cardiac muscle cells is high because they have many mitochondria.
E) Intercalated disks contain both desmosomes for firm attachment and gap junctions to allow communication.

How is the city of savannah related to the union strategy of a full blockade of confederate ports? a) savannah was the last port needed to be secured in order to totally blockade the coast of georgia. b) savannah was the least significant city in georgia, and the union strategy centered on securing atlanta and capturing the tennessee river. c) savannah was the least significant city in georgia, and the union strategy centered on securing atlanta and capturing the chattahoochee river. d) savannah was the most significant port in georgia, and the union strategy centered on securing bases at savannah and the outlying islands to fully blockade georgia.