From the right ventricle, blood flows directly into the _____
A. aorta
B. right atrium
C. pulmonary trunk
D. pulmonary arteries
E. pulmonary veins
C
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The frequency of a sound is indicated to the nervous system by the
A) frequency of hair cell vibration in the spiral organ. B) number of rows of hair cells that are stimulated in the spiral organ. C) region of the basilar membrane of the spiral organ that is stimulated. D) movement of the perilymph in the cochlear duct. E) frequency of vibration of the tectorial membrane of the spiral organ.
Cancer is the most common cause of death in the United States.?
Indicate whether the statement is true or false
Denaturation is
A. a substance that conducts electricity when placed in solution. B. a combination of atoms held together by chemical bonds. C. a positively charged ion. D. a negatively charged ion. E. a change in the three-dimensional structure of a protein.
Which function of proteins is NOT correctly matched with the example?
A. Contraction - actin and myosin in muscles B. Structure - collagen and keratin C. Protection - packing around organs and glands D. Regulation - enzymes and hormones E. Transport - hemoglobin