精选医学基础知识（Selected basic medical knowledge）.docVIP

精选医学基础知识（Selected basic medical knowledge） Selected questions of medical basic knowledge The correct principle of fluid replacement during shock is () A. rehydration is better than less B. how much does it take? C. supplements the lost part of the fluid and the fluid that continues to lose the day D. how much is missing, how much is it? E. if normal blood pressure, do not have rehydration Answer: B When the shock occurs, the correct fluid replacement principle is: how much is needed and how much is filled. How much should be included: lost part in vitro Part of body fluid; vascular bed capacity expansion; microcirculation stasis and plasma extravasation part. Advantages of component transfusions include () A. reduces transfusion reactions B. reduces heart burden in patients C. improves treatment outcome D. saves blood E. reduces the incidence of transfusion infectious diseases Answer: ABCDE Analysis: component blood transfusion has the advantages of reducing side effects, reducing the occurrence of immune reaction, improving curative effect, reducing the cardiovascular load, saving blood and reducing the occurrence of blood borne infectious diseases. DNA changes occur when denatured () The release of A. double chains into single strands is rapid B. high color effect C. viscosity change D. covalent bond breaking E. hydrogen bond fracture Answer: ABCE Resolution: the main physical property of DNA is that DNA double chains can be separated into single strands and double chains are formed, separating single strands Denatured for DNA. DNA denaturation causes increased absorption of solution 260nm UV, which is known as the high color effect; DNA denaturation causes maintenance of base pairing The hydrogen bond breaks down and the solution viscosity decreases. DNA denaturation is not caused by covalent bonds Unconjugated bilirubin is characterized by () A. water solubility is big The permeability of B. cell membrane is large C. is highly affinity with plasma albumin D. nor