How does aspirin help reduce blood clotting?
1.It reduces the red blood count.
2.It reduces platelet aggregation.
3.It reduces the platelet count.
4.It binds to fibrin.
5.It inhibits thrombin.
2
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Biological membranes are held together mainly by
a. hydrogen bonds between lipid molecules. b. hydration layers over lipid molecules. c. exclusion of the nonpolar regions of lipids by water. d. hydrogen bonds between water molecules. e. surface tension at the interface between layers of water molecules.
Which of the following is an action of the sympathetic nervous system?
a. to increase stomach activity b. to decrease heart rate c. to dilate the pupils d. to stimulate intestinal activity e. to decrease blood pressure
When rivers flow into the ocean, they create a zone that mixes freshwater with saltwater referred to as a(n) ________
Fill in the blank(s) with correct word
During bacterial conjugation, the recipient cell receives a single-stranded loop of DNA.
a. true b. false