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1. As a person becomes very dehydrated, the concentration of water in her blood decreases. In which direction will water move across the plasma membranes of her blood cells? What will happen to the volume of the cells as a consequence? Why is proper hydration important for multicellular organisms?
2. You were cleaning out the aquariums in the biology lab and you accidentally placed the saltwater fish in the freshwater tank. What will happen to the cells of these fish?
3. In some countries, human waste is used as a fertilizer. If produce is grown in this type of fertilizer, it is possible that it will be contaminated with the protozoan that causes amoebic dysentery. One method of removing the protest without ruining the food is to place the produce in a 5% salt solution. Explain how this would kill the protest. If you cleaned your lettuce this way, what would happen to the lettuce cells? How could you return them to normal?
What are the four most important elements necessary for life on this planet? Name the four most important groups of organic molecules for life? Give an example of each.
Since L-glucose cannot be metabolized, it has no caloric value. Why is L-glucose not the perfect diet aid? An uncatalyzed reaction has a rate of 4.2 x 10-7 sec-1. When an enzyme is added the rate is 3.2 x 104 sec-1. Calculate the rate enhancement c..
A reaction that has a Gibbs free energy of -0.0001 kJ/mol:
In the Australian Shepherd, Hereditary Cataracts is an autosomal dominant disorder that results in abnormal clouding of the lenses of the eye. In some Aussies, heterozygous for Hereditary Cataracts, the disease is not always expressed. Based ..
Given the variation in pressure with height, in clinical medicine human blood pressure is normally referenced to heart level. Does this usually affect the pressure recorded from the upper arm?
Apply the principle of exponential growth to the cells in a multicellular organism where a cancer arises in a lymph node. Assume the tumor cells double every 18 hours and none die. How many days will it take to become a palpable mass (approximatel..
A 28 year old woman cuts her hand while picking up broken glass. The wound is cleaned and sutured. Which of the following mediators of inflammation plays the most important role in stimulating platelt aggregation at the site of injury during this ..
Suppose you have a solution containing both salt (NaCl) and glucose, and dialysis tubing with a pore size that allows the passage of Na+ and Cl- ions, but doesn't allow the passage of glucose. How could you remove essentially all of the salt from ..
In Cross one, pure-breeding colored, starchy kernel plants were crossed to plants pure-breeding for colorless, waxy kernels.
Present at least three of the discoveries you find to be most important and describe their significance to society, health, and the culture of modern life
Choose a disease or condition that is associated with the nervous system. Provide a thorough overview to include the meaning of the medical term associated with it and its origin (Greek or Latin) as appropriate. Apply all related medical terms and th..
How do find the recombination frequency of two genes: take for instance a cross between two flies, one with mutant short antennae (s) and mutant big feet (b) and one with wild type long antennae (s+) and wild type small feet ( b+). You get the..
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