Cardiac muscle cells
A. have smooth ER but no T tubules.
B. develop a significant oxygen deficit during systole.
C. form the heart valves.
D. are maintained by an extensive capillary network.
E. do not contain actin and myosin like skeletal muscle fibers.
Answer: D
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Which of the following accurately describes thromboplastin?
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_____________ is the bacterium that causes gastric ulcers
Fill in the blank with the correct word.