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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. Oops! 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 focal length must a pair of glasses have if they are to correct the vision of a person with a near point of 57.5 cm? The glasses are worn 1.8 cm from the eye.
Imagine looking during a microscope at a squashed onion root tip. The chromosomes of many of cells are plainly visible. In some cells, replicated chromosomes are aligned along center (equator) of the cell. These particular cells are in which stage of..
Noda and Numa in 1984 isolated the first voltage-gated sodium channel gene from the electric organ of the electric eel. Electric organs contain a high density of sodium channels. Tetrodotoxin (TTX) is a potent neurotoxin that blocks sodium channels. ..
Assume you are an ecologist studying the effects of acid precipitation on plant life. Explain an experiment you would perform in order to determine which plant species will be a useful indicator species for acid rain pollution.
A certain membrane protein has palmitic acid covalently bonded to its N-terminal amino acid. The protein consists primarily of charged amino acids, particularly Lys and Arg. Do you think this will be a periperal or integral membrane protein? Why? ..
Sort the statements into appropriate bins depending on which type of learning they explain. What is her anatomical dead space volume.
Explain a muscle contraction beginning with the motor neuron to relaxation of the muscle. Discuss the physiological relationship of the muscular and skeletal system.
define a well-controlled experiment to determine if the rise in internal free calcium observed in the cytoplasm of unfertilized sea urchin eggs in the presence of A23187 is due to in flux of calcium from seawater. Include experimental treatments, ..
At the present we know that over 99 percent of the time, glucose occurs in the closed-ring form. What likely difference between these forms would give chemists a clue that the open-chain form was not present.
While you measure the genotype frequencies of the population you get the following data. What will the frequency of Aa be in the next generation.
Explore the role of the epigenome and/or other gene expression regulatory mechanisms in the development of cancer. Discuss in detail one possible epigenetic/post-transcriptional/post-translational target for cancer treatment, and identify the succes..
If a maize plant is heterozygous for the alleles for pigmy and crinkly-leaf (both recessive to normal size of plant (S) and normal leaf (L) is self pollinated and 208 seeds are subsequently collected and germinated, how various would you expect to sh..
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