Renin is an enzyme that acts on
A. angiotensinogen.
B. angiotensin II.
C. aldosterone.
D. angiotensin I.
E. atrial natriuretic factor.
Ans: A. angiotensinogen.
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Which one of the following diagnostic imaging techniques does NOT expose the patient to additional radiation?
A) X- rays and ultrasounds B) ultrasounds and PET scans C) ultrasounds and MRI D) PET scans and MRI E) PET scans and X-rays
Which of the following statements about the graph is true?
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Which of the following is an important force for evolution?
A. Mutation B. Genetic drift C. Migration D. Natural selection E. All of the above