Viagra® works by dilating the arteries to the penis and other parts of the body. Why shouldn't a person use nitroglycerin at the same time that he is using Viagra®?
What will be an ideal response?
Both drugs will reduce the blood pressure (because they dilate blood vessels), and the combination may cause it to become so low that the person's heart can no longer pump sufficient blood to the vital organs.
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A cell cycle checkpoint at which phase would ensure sufficient nutrients for cell division were available?
a. S b. prophase c. metaphase d. G1 or G2 e. G1 or S
Insulin stimulates cells to take in glucose by facillitated diffusion, so insulin receptor-down regulation
increases the ability of cells to take in glucose. __________________ Indicate whether the statement is true or false.
Which statement is NOT true about DNA replication?
A. It occurs more rapidly in bacteria than in eukaryotes. B. One strand of new DNA is replicated faster than the other strand at the replication fork. C. DNA replication is considered semiconservative because there is always an old strand acting as a template for a new strand. D. It proceeds in a 5'-to-3' direction only. E. DNA can only replicate at one point on a chromosome at one time.
What should you do when something you believe turns out to be wrong?
A) feel ashamed B) blame the government C) change your mind D) doubt your ability to properly perceive the sensory stimuli of the world E) regroup and keep testing your hypothesis until you prove yourself right