An apple pie has 2 million (2 x 10^6) Staph. aureus cells in it. The food preparer did not wash his hands and probably inoculated the cream with 200 Staph. aureus. He also forgot to refrigerate it. If the pie was made 6 hours ago, how many generations have occurred? How long is each generation? Using the generation 2number of generations x initial number of bacteria = total # of bacteria present after n generations time you calculated, how many bacteria would be present after 8 hours at room temperature

Explanation:

given cells at incubation = 2 million (2 x 10^6) Staph

cells at the start of incubation = 200 Staph

Total time =6hrs = 360minutes

Recalling that Number of generations = Log(cells at incubation) - Log (cells at the start of incubation)/0.301

        = 20.93 generations.

        = 360/20.93 = 17.20minutes

as said, that the apple pie is left after 2hrs, it implies 8hrs (480minutes) will be the new total time; number of generations = total time / generation time

= 480/17.20minutes =  27.90 generations

       = 2^27.90 x 200 staph = 5.009 x 10^10 bacteria

its been noted for the past decade or so that there is some (approximately 5% to 7%) shrinkage in the brains of people who have schizophrenia, most notably in the gray matter, which is an important part structures in the brain’s amygdala, hippocampus and parahippocampus, which are all involved in memory storage and retrieval memory storage and retrieval.

explanation:

ive read articles

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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