生理题（Physiological problem）.docVIP

生理题（Physiological problem） First, the multiple-choice questions (1 points per subject, 40 points) 1. in the relative refractory period (C) A normal stimulation can produce action potential B, subliminal stimulation can produce action potential C suprathreshold stimulation produces an action potential D that is less than the normal potential, and the threshold stimulus does not produce action potential Which of the following ion permeability is the largest (A) for the 2. cell membrane under resting conditions? A potassium ion, B, sodium ion, C, chloride, D, calcium ion 3. if the ESR is increased, the blood is put into the blood of the normal ESR, and the erythrocyte sedimentation rate is (B) A unchanged, B faster, C slow down, D first fast, then slow 4. the most important anticoagulant in plasma is (B) A, urokinase, B, anticoagulant III, and heparin, C, kallikrein, D, tissue activator 5., poor suspension of erythrocytes occurs (C) A hemolysis, B thrombosis, C overlap, D fragility increases 6. the elastic reservoir vessel is (C) A vein and artery B arteriole and arteriole, C aorta and its branch, D capillary 7, the most potent metabolite of coronary vasodilation is (D) A hydrogen ion, B, carbon dioxide, C, lactic acid, D, adenosine, E.ADP 8 direct direct stimulation of the central chemoreceptor of the medulla oblongata is (C) A the change of the partial pressure of carbon dioxide in blood B the change of the oxygen partial pressure in blood C the change of the concentration of hydrogen ion in the cerebrospinal fluid and the change of the concentration of hydrogen ion in D blood The resting potential of 9. ventricular myocytes is mainly (C) The electrochemical equilibrium potential of A sodium ion; the electrochemical equilibrium potential of calcium ion B; the electrochemical equilibrium potential of C potassium ion; the equilibrium potential of D, sodium ion and potassium ion; the equilibrium potential of E, Ca2 + and K + ions 10. which of the following circumstances