Heart Anatomy Multiple Choice Questions PDF

lOMoARcPSD|42936638 The purpose of the four valves of the heart is to ____. A) control the rate of blood flow B) ensure one-way blood flow C) keep the blood in the correct chamber D) maintain blood pressure E) generate rhythmic contractions Bod...

lOMoARcPSD|42936638 The purpose of the four valves of the heart is to ____. A) control the rate of blood flow B) ensure one-way blood flow C) keep the blood in the correct chamber D) maintain blood pressure E) generate rhythmic contractions Body cells surrounding capillaries usually have a ____. A) high oxygen concentration B) low oxygen concentration C) low carbon dioxide concentration D) high nutrient concentration E) low concentration of waste products Water is forced through capillary walls by ____. A) different concentrations of substances B) low pressure of the blood C) filtration D) osmosis E) diffusion In the clinical setting, blood pressure refers to _______. A) lymphatic pressure B) arterial pressure C) osmotic pressure D) venous pressure E) intracardiac pressure Blood pressure is greatest in the arteries ____. A) when the heart is between contraction and relaxation B) when the atria contract C) when the Purkinje fibers are stimulated D) when the SA node fires E) when the ventricles contract What causes a myocardial infarction? A) Damaged heart valves B) Weakened heart muscle C) Obstruction of blood flow to the heart muscle D) A serious dysrhythmia E) A defective SA node The ____ lies on top of the visceral pericardium. A) fibrous pericardium B) parietal pericardium C) myocardium D) endocardium E) epicardium Downloaded by Sheldon Lo ([email protected])