Some athletes use "blood doping," adding additional red blood cells to the blood, to achieve a competitive edge. What will the extra red blood cells do in the body?

A) make the heart beat faster
B) increase O2 delivery to muscles
C) decrease blood pressure
D) change the blood type


B

Biology & Microbiology

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The dominant stage in the life cycle of tracheophyte plants is the  

A.  epiphyte generation. B.  sporophyte generation. C.  spore generation. D.  gametophyte generation. E.  angiosperm generation.

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Glycolysis, pyruvate oxidation, and the citric acid cycle all produce ____

a. CO2 b. H2O c. ATP d. FADH2 e. NADH

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Both smooth muscle fibers and cardiac muscle fibers:a

have striations. b. are under involuntary control. c. are multinucleate. d. have a comparable resistance to fatigue. e. have a comparable intermediate speed of contraction

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Each FADH2 that enters the electron transport system gives rise to _____ ATP.

A. 2 B. 3 C. 24 D. 36 E. 38

Biology & Microbiology