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- fMRI works because: A) oxygen-rich blood has a larger magnetic signal than oxygen-poor blood. B) oxygen-rich blood has a smaller magnetic signal than oxygen-poor blood. C) the magnetic properties of blood do not change with the amount of oxygen content in it. D) water has magnetic properties.Why are controls needed when conducting scientific experiments?What color should the contents of tubes 3 and 4 be at the end of the experiment? What is the reason for the colors that you predicted in Part A for tubes 3 and 4? Explain your response in terms of the processes responsible for the color changes and the organism(s) involved in each case. If tube 4 was placed in the dark for the duration of the experiment, predict the color of the contents of tube 4 at the end of the experiment. Explain your response.
- Name four process controls and their importance. (related to medical laboratory)Explain the procedure of a pulse-chase experiment.What is the pulse, and what is the chase? What was the purposeof the approach?You treat some cancer cells with a new therapeutic that you hope will kill them. You run an MTT assay on the results and notice that the sample from the control cells (not treated with drug) turns purple upon addition of the MTT and the sample from the cells treated your drug are clear after adding MTT. As you walk down the hall to run your sample on the spectrophotometer, how are you feeling? (a) frustrated, (b) unsure, (c) excited. I understand that if the cell are alive, they will have functioning mitochondria, the mitochondria will be producing NADH and NADPH which will allow some enzymes in the cell to convert empty T which is colorless, into a colored form as and die. The colorelss means less dye with present, which means the less empty T was converted, meaning that we had less mitochondrial activity, which means we had less live cells. I think that the answer should be (a) frustrated. I am not sure if I am right. Glad if the expert advise.
- The diagram shows a simplified cross-section of a human body and an ultrasound transducer.. 1swog meipsib eru of epnetster ritiW a) Explain what happens to the ultrasound signal as it travels from the probe through the body. b) Sketch a graph showing how the intensity of the signal detected by the probe varies with time following the transmission of a pulse of ultrasound with the probe in this positionWe did the experiment in class but I don't understand the second page which is number 5 can these be explain thank youA) Identify the INDEPENDENT variable in the experimental setup shown in the diagram. B) Describe at least two possible DEPENDENT variables that could be used to evaluate the results. C) List at least 3 variables that should be controlled in this experiment.
- In Beadle and Tatum experiments the immediate effect of the X-ray treatment wasExplain why the electrodes were placed on the forehead and on the scalp at the back of the head?What is the experimental procedure illustrated in the figure above? What label (1-3 words) would you write next to each of the 5 arrows in the procedure? ) Briefly write a concise but complete description of the figure closely following the labels you have used in your answer to the second part of the question.