Which of the following is false concerning cardiac
muscle cells? They
a. are striated.
b. contain a single nucleus.
c. have more mitochondria than do other types of
muscle cells.
d. have large stores of glycogen for energy.
e. depend on aerobic respiration to supply their
ATP.
Answer: d
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The oxygen needed for respiration moves from the lungs and into capillaries by simple diffusion. Once in the capillaries, what molecule or other component of blood is responsible for transporting oxygen in the circulatory system?
A. There is no transport molecule; oxygen remains free in the blood. B. white blood cells C. hemoglobin D. cadherins
The vertebrate lung first appeared in which organism?
a. fishes b. amphibians c. reptiles d. birds e. mammals
A fast-twitch muscle fiber
A. uses ATP quickly in short, fast contractions. B. has many capillaries. C. is rich in myoglobin. D. works aerobically. E. All of the answer choices are correct.
A pellicle is NOT
a. thin. b. inside the plasma membrane. c. made of elastic proteins. d. intended to protect the cell. e. involved in retaining the shape of the cell..