"Artery" and "vein" are defined by whether they carry blood to the heart or away from the heart. If they were defined by whether they carried oxygenated or deoxygenated blood, we would have to change the name(s) of
A. the pulmonary artery and vein; they would have to be switched.
B. the coronary artery and vein; they would have to be switched.
C. the hepatic portal vein to a hepatic portal artery.
D. the hepatic and renal systems; they would have to be switched.
E. none, since the aorta and vena cava do not have "artery" and "vein" in their name.
Answer: A
You might also like to view...
Which of the following statements about regulation of the lac operon is true?
A. When glucose is present, gene expression is activated by lactose. B. The amount of glucose in the growth medium does not affect the level of gene expression activated by lactose. C. The binding of the Lac repressor to the operator is not affected by the presence of glucose. D. Gene expression is high when the Lac repressor is not bound to the operator and glucose is available.
Which enzymes from the pancreas function in the small intestine to digest proteins?
a. amylases b. lipases c. trypsin and chymotrypsin d. bile acids e. disaccharidases
The movement of organic compounds in
phloem is described as a. sink-to-source. b. pressure flow. c. cohesion-tension. d. active transport. e. transpiration pull.
If the nucleotide sequence in a DNA template strand is GGCTTAACCATT; the complementary mRNA strand will
have the sequence ____________________. Fill in the blank(s) with the appropriate word(s).