The ________ valve guards the entrance to the ________, which carries ________ blood to the lungs.
A. aortic; aorta; deoxygenated
B. bicuspid; aorta; oxygenated
C. pulmonary semilunar; pulmonary trunk; deoxygenated
D. mitral; pulmonary trunk; oxygenated
Answer: C
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Which of the following disorders involving the organ labeled E can result from viruses, drugs and chemicals such as alcohol?
a) heartburn b) mumps c) pancreatitis d) hepatitis e) vomiting
Which of these does NOT increase the risk for cardiovascular disease?
A) menopause without estrogen replacement therapy B) having diabetes mellitus C) being a female over 30 but under 55 D) being a male over 30 but under 55 E) having a sister with coronary artery disease
The phase of mitosis that begins as spindle fibers pull sister chromatids apart at the centromere is
A. metaphase. B. interphase. C. prophase. D. telophase. E. anaphase.
Most activated B-lymphocytes differentiate into
A. macrophages. B. plasma cells. C. memory helper T-lymphocytes. D. antigen-presenting cells.