Which of the following is not a feature of cardiac muscle?
A) They depend almost exclusively on aerobic respiration.
B) They have larger than average mitochondria.
C) They are rich in glycogen.
D) They are very rich in myoglobin.
E) They have about the same endurance as skeletal muscle fibers.
E
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The porphyrin ring of heme contains an atom of
A) calcium. B) magnesium. C) sodium. D) copper. E) iron.
Which of the following muscles is considered a "lateral hamstring," based on its insertion?
A) semitendinosis B) biceps femoris C) gracilis D) semimembranosis
Which chemical stimulates interstitial cartilage and appositional bone growth?
A. Growth hormone B. Vitamin D C. Calcitonin D. Sex hormones E. Parathyroid hormone
A change in the genetic composition of a population over time is called ________.
A. adaptation B. evolution C. natural selection D. mutation E. selection pressure