NAD+ is the product of the oxidation of NADH, just as Ag+ is the oxidized product of Ag. The ReDox that occurs in the Electron transport chain, with NADH losing an electron to the ETC and getting-you guessed it-oxidized, is the exact same concept. Therefore, when a metal is losing or gaining electrons, it’s either getting oxidized or reduced, respectively.ĭon’t stop there. We know that LEO the Lion says GER (the Loss of an Electron is Oxidation and the Gain of an Election is Reduction). Tip 1: When studying a “physical” science, think through all of its biological applications.įor example, let’s use reduction and oxidation. Success will only come with practice, so here are a couple of tips: Knowing formulas and reactions is necessary for success on the MCAT, but will in no way be sufficient. The human body is a network of interdependent physical, chemical, and biological processes, and the MCAT measures your ability to make those connections. The interplay of scientific disciplines (i.e., how your knowledge of physics or chemistry informs your understanding of how an organ works) is paramount to your success both on the new MCAT and as a future physician. Your MCAT practice will require being able to see the same concepts that you learned in your undergraduate pre-med classes in a very defined and isolated environment-applied in a foreign scope to integrated sciences. Finally, after treatment, the patient should return to a normal blood pH with adequate ventilation and would not be expected to overcompensate by becoming acidemic, eliminating choice (D).Īlthough the designers of the MCAT will provide physiological facts and numbers, that’s not what you’re expected to know before taking the exam. There is no evidence to believe the measurement was inaccurate, eliminating choice (B). While the kidneys should compensate for alkalemia, this is a slow process and would not normalize the blood pH within an hour further, adequate compensation by the kidneys would actually be a reassuring sign, eliminating choice (A). Despite the fact that this pH is normal at the moment, this patient is crashing and may start demonstrating acidemia in the near future. By extension, carbon dioxide is trapped in the blood, and the pH begins to drop. In this case, the patient begins to decrease his or her breathing rate and is not receiving adequate oxygen. When a patient with an asthma attack does not respond to treatment and has been hyperventilating for over an hour, he or she may become fatigued and may not be able to maintain hyperventilation. The score for this section of the test is combined with the other three sections to give an overall score ranging from 472 to 528. There is no specific number of right or wrong questions that corresponds to a given scaled score instead, each test administration is curved according to its level of difficulty and the performance of the test-takers on that day. The biology/biochem section of the MCAT is scored on a curved scale of 118-132, with the median score of all test takers set at 125. You can find more details on what you need to know about the overall structure of the MCAT here. These will also be designed to test both your science knowledge and application of that knowledge based on these four skills. You will also be presented with 15 discrete questions that are not associated with passages. The questions will address the four skills listed, although not every passage will require you to use each skill. The MCAT will present you with 10 passages on biology and biochemistry topics, and ask 4-7 questions about each passage.
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