
A. our intercostal muscles contract and our ribs move down
B. our diaphragm muscles contract and the ribs move up
C. our diaphragm muscles contract and the ribs move down
D. our intercostal muscles contract and the diaphragm muscles relax
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A. group O only
B. group AB only
C. groups A and B
D. any group
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A. you are injected with an antibody to the disease
B. you recover from an attack of the disease
C. you are inoculated, against the disease
D. you are born with antibodies to the disease
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A. antigens
B. antibodies
C. antidotes
D. antitoxins
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A. hepatic vein and vena cava
B. hepatic artery, hepatic vein and vena cava
C. hepatic portal vein and vena cava
D. hepatic portal vein, hepatic vein and vena cava
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A. less carbon dioxide, less oxygen and less glucose
B. more carbon dioxide, more oxygen and less glucose
C. more carbon dioxide, more oxygen and more glucose
D. more carbon dioxide, less oxygen and less glucose
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A. thick walled
B. permeable to salts (ions)
C. small diameter
D. repeatedly branched.
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A. liver
B. stomach
C. mouth
D. duodenum
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A. animal parasitism
B. plant parasitism
C. commensalism
D. mutualism
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A. stomach
B. the intestine
C. liver
D. veins
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