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Describe 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, controls, and briefly describe experimental methods.
Note: As mentioned in the lab manual, the calcium concentration in seawater is 10mM while the concentration in unfertilized egg cytoplam is greater that 10-6 M. Immediately after fertilization or in unfertilized eggs treated with A23187 the internal calcium concentration increases.
The endocrime and nervous system are main regulating systems of the body. However, the nervous system has been compared to an airmail delivery system, and endocrime system to the pony express. In brief explain this comparison.
Approximation the age group and gender (where possible) of the individuals in this find. Throughout exposure to elevated glucose, a yeast cell's membrane glucose transporters will rapidly enhance so the cell can import glucose. Which will represent t..
Suppose that transgenic organisms can be developed to speed nitrogen fixation. How might use of these organisms affect ecosystem.
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..
Noah is a technician assigned to photograph chromosomes. At what stage of the cell cycle are the chromosomes sufficiently condensed that they FIRST become visible under light microscope.
Describe how those mutations can potentially result in cancer. Make sure you list all references used for information and images.
Do you really think the age of the man is main in determining the chance of chromosomal abnormalities? Why or why not with appropriate reasons. Describe a single meiosis event.
What substance is known as the "spreading factor?" How does the "spreading factor" aid an organism in its quest to penetrate the host cell? What is the dissimilarity between net primary production and net primary productivity.
Both chemical and physiological buffering systems exist in the body. What are the two organ systems involved in physiological buffering.
Compute the number of RBC if the dilution is 1:50, the cell count is 400 cells counted in five (5) RBC squares of the hemocytometer.
If a transferrin receptor has a cross-sectional area of 50 Angstroms X 100 angstroms (5x10nm), and how many receptors could be accomodated in a 100nm clathrin-coated vesicle assume that only 50% of surface area can be occupied by proteins.
Most birth control methods are designed to remain the egg and sperm from uniting to form a zygote. How do they keep sperm from uniting with egg.
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