生理学章节测试课后答案2024春

第一章测试

1.The AV node, which normally exhibits the fastest rate of autorhythmicity is known as the pacemaker of the heart.
A:错 B:对
答案:A
2.Bulk flow occurs because of differences in the hydrostatic and colloid osmotic pressures between the plasma and interstitial fluid.
A:错 B:对
答案:B
3.Which of the following correctly ranks pressures during isovolumetric contraction of a normal cardiac cycle?
A: aortic > left atrial > left ventricular B:aortic > left ventricular > left atrial C: left ventricular > aortic > left atrial D:left ventricular > left atrial > aortic E: left atrial > aortic > left ventricular
答案:B
4.When the radius of the resistance vessels is increased, which of the following is increased? 
A: Capillary blood flow B:Diastolic blood pressure   C:Viscosity of the blood   D: Hematocrit   E:Systolic blood pressure  
答案:A
5. What is mainly responsible for the delay between the atrial and ventricular contractions?
A:slow action potential conduction velocity along atrial muscle cell membranes B:slow action potential conduction velocity of AV node cells C:greater parasympathetic nerve firing to the ventricles than to the atria D: the shallow slope of AV node pacemaker potentials E:slow action potential conduction in the Purkinje network of the ventricles
答案:B