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In one day the average person secretes about 2.5 litres of gastric juice into the stomach. The pH of the cells in the stomach lining that perform the secretion is about 7 (the same as for all cells) and the pH of the stomach is about 1. Thus, H+ ions must be moved against an H+ gradient. The free energy change for moving molecules against a gradient is:
^G = R T lne(C2/C1) (where ^ = delta)
where C2 is the greater concentration. If the process of pumping H+ ions is 20% efficient, how many moles of ATP are used each day to secrete gastric juice? How many kilograms could be lifted one meter (20% efficiency) wiht this energy?
explain The process by which the bacteria affect milk is outlined in text books, but the "meat" process seems to be glossed over.
A friend of yours is wearing a bright red shirt. In terms of properties of light and pigments, describe why the shirt appears red to you.
In horse, black coat colour is influenced by the dominant allele (B) and chestnut coat colour by the recessive colour (b). Trotting gait is due to dominant gene (T), pacing gait to the recessive allele (t). What colour horse would you use to find out..
Joshua Ledergerg said, "Our only real competition for domination of planet remains the viruses." In what respect might you make a similar argument about insects.
Which hormone causes an increased output of enzyme-rich pancreatic juice and stimulates gallbladder contraction to free bile. Build up a network design that accommodates these requirements and keeps costs down. These training environments must hold a..
The heart is in the middle thoracic cavity, known as the ______. The membrane around the heart is the ______. The thick muscular wall of the heart is the ______. The smooth inner lining of the heart is the ______.
Metric Conversions using Dimensional Analysis the key to using dimensional analysis is the right use of conversion factors what is a conversion factor.
Joe Average has just been frightened by a very loud noise as he was taking a very difficult physiology exam. In response, his adrenal glands have released a large amount of adrenaline into his circulation. Which of the effects would you expect to ..
A black A/A B? B C? C is crossed with a colourless a/a b/b c/c to give a black F1. The F1 is selfed. What proportion of the F2 individuals is colourless.
Case study on Salmonella Outbreaks in the U.S.
What factors establish the choice of a paper strip containing bacterial endospores or a sealed ampule containing an endospore suspension for testing heat-sterilization equipment.
Examine the challenges faced by the Public Health System. Epidemiology and Evolving Health Care System
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