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a) A human nerve cell with an average surface area of 250,000micrometers squared has an extracellular potassium ion concentration of 3mM and an intracellular potassium concentration of 90mM. An impulse causes the potassium channels to open and the ions start to flow out of the cell. At what rate do the ions flow out of the cell if P=0.03cm/s?
b) Now the recovered nerve cell (intracellular potassium concentration of 90mM) is placed into 80mM potassium solution and excited for a second time. What is the rate of diffusion here? By what factor does it change when comparing to sceniaro a (the first one above)?
How is a Scathard plot generated, and what measure of the inter-molecular interaction is used to find this?What is the proteasome.
Which phenomenon accounts for movement of these genes. Because a doughnut contains large quantity of energy that can become available for our metabolism when eaten, why isn't the doughnut "jumping" all over counter or hot to the touch.
A twenty-oneyear-old woman presents with a three month history of malaise, joint pain, weight loss, and sporadic fever. Her temperature is 38°C (101°F).
Early in development, most human cells turn off expression of essential component of telomerase, enzyme responsible for addition of telomere repeat sequences (5' TTAGGG 3') to the ends of chromosomes.
Assume you have an animal cell in a culture and you add Carbon fourteen specifically labled glucose to the culture so that you can track the movement of carbon within the cell.
Why a defendant's genes do not excuse criminal behaivor.
A patient with hypothyroidism presents with low T3 and T4, and elevated TSH & antibodies to thyroglobulin. The thyroid is infiltrated with lymphocytes that have replaced large part of thyroid.
Soil stabilization is the permanent physical and chemical alteration of soils to enhance their physical properties. Stabilization can increase the shear strength of a soil and control the shrink-swell properties.
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? ..
Which of the subsequent statements is true about phylogeny. The ancestral group frequently has all the synapomorphies of the descendant species.
What is anatomical variation of the GIT of carnivores, omnivores and non-ruminant herbivores and relate morphological variations with their diet and environment.
Just completed an experiment on Gluconeogenesis looking at the different precursors. I am a bit stuck on why lactate and alanine might be of different efficiency as gluconeogenic substrates.
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