Which of the following statements about gas exchange in animals with interacting circulatory and respiratory systems is FALSE?
A) Carbon dioxide moves from the tissues into the blood by diffusion.
B) Gases are transported in the circulatory system by the bulk flow of blood.
C) Oxygen is actively transported into the circulatory system.
D) Air or water moves across the respiratory surface by bulk flow.
E) Oxygen and carbon dioxide pass through respiratory membranes by diffusion.
C
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Sperm are produced in the
a. testes. b. vas deferens. c. epididymis. d. prostate gland. e. penis.
Each of the following numbered respiratory complexes is correctly paired with its name except
A) complex I: NADH-coenzyme Q oxidoreductase complex. B) complex II: succinate-coenzyme Q oxidoreductase complex. C) complex III: coenzyme Q-cytochrome c oxidoreductase complex. D) complex IV: cytochrome c reductase complex. E) None of the above are correctly paired.
pRb is a major control element of the cell cycle. It normally becomes
A. Transcriptionally induced at the G1 checkpoint B. Dephosphorylated at the G1 checkpoint C. Phosphorylated at the G1 checkpoint D. Phosphorylated at the G2 checkpoint E. Transcriptionally induced at the G2 checkpoint
Which of these joints allow movement in only one plane, such as in the knee or elbow?
A) hinge B) ball-and-socket C) fibrous D) cartilaginous