What is the function of valves in veins? what is the function of valves in veins? they counteract low venous pressure, and prevent backflow of blood away from the heart. they are the reason that a relatively higher amount of blood resides in veins, compared to arteries. they propel blood with great velocity. they compensate for the larger lumens of veins compared to arteries of similar size?

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

This question is only for applicants to scholars for medicine or scholars for dental medicine: what aspects about medicine (or dental medicine) intrigue you? describe how these aspects influence your life. (100-650 words)

What sre the effects of hemolytic disease of a newborn