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Cytosolic Ca++ concentration typically rise about 40-fold when Ca++ channels open in the plasma membrane. Assume that 1000 Ca++ channels open in a cell with a volume of 1000 micrometer cube and an internal Ca++ concentration of 100 nM. Each Ca++ channel passes 1,000,000 Ca++ ions per second. How long would the channels need to stay open in order to raise the cytosolic Ca++ concentration from 100 nM to 4 microMoles?
Haemophilus influenza requires hemin to synthesize cytochromes and NAD from other cells. For what does it use these two growth factors? What disease(s) does H. influenza cause?
Discuss the difference and similarities between mosses fern and gymnosperms to their life cycle? and how did they adapt to a land environment?
In bacterium that possesses antibiotic resistance and potential to persist through very adverse conditions, such as freezing, drying, or high temperatures, DNA have to be located within, or be part of, which structures.
Certain restriction enzymes produce cohesive (sticky) ends. this means that they a) make a staggered double-strand cut, leaving the ends with a few nucleotides of single-strand DNA protruding. b)cut in regions of high GC content.
Find out the genotypes of the parents and their pups. Use Punnett Squares to demonstrate your answers. What did Mendel observe in the F2 offspring that showed him that alleles for seed shape segregate separately of those for seed colour.
Plainfin midshipman female fish caught during the winter, non-breeding months do not respond to recordings of male plainfin midshipman's mating hum unless they are injected with certain steroids? What are these steroids and what class of receptors..
A mole of an assured compound contains 207.7 g of lead and 32.00g of oxygen. Without doing any calculations, tell whether a formula Unit of a compound contains more atoms of lead or more atoms of oxygen. Explain in details.
Before this module evaluation you were very nervous. Consider a snack might help, you ate a big bowl of pasta and some bread a couple of hourse before you started this quiz.
Calcium Polycarbophil is calcium salkt of polyacrylic acid cross linked with divinyl glycol. But what is its forumla.
Explain the physiological connections between calcium blood levels and the actions of calcitriol, calcitonin, and parathyroid hormone. What are the dangers if one of these is not working properly? Now consider large number of postmenopausal women tak..
Calculate the osmotic pressure, at 30°C, of 58.5 grams of NaCl in 1 liter of solution against pure water with a membrane that separates the pure water and salt solution and is impermeable to NaCl but permeable to water.
How do the semicircular canals determine the direction of acceleration of the head? Why is there efferent innervation from the central nervous system the outer hair cells?
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