Study Guide Ch 12xD Lecture Study Guide Ch 12xDPowerPoine Presentation x structu
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Question
Study Guide Ch 12xD Lecture Study Guide Ch 12xDPowerPoine Presentation x structure.com/courses/153 item,id 310279 13. Which of the following is/are) true during isovolumetric ventricular contraction? I. All four heart valves are closed 1. Ventricular systole is just beginning IL The volume of blood in the ventricles is increasing IV. The volume of blood in the ventricles is equal to the end diastolic volume (EDVI 1 only and Il only Il and 11l only IlI and IV only I, ll and IV only 14. Drugs called beta-blockers black (prevent the action of epinepharine and norepinephrine in the lead to a decrease in the force of contraction cause an increase in venous return cause an increase in heart rate Both A and B None of the above . 15. Which of the following would occur after baroreceptors detected a moderate drop in blood pressure (a deviation from homeostasi)t The cardiovascular center would increase parasympthetik stimulation to the heart The cardiovascular center would decrease sympathetic stimulation to vasomotoe nerves Systemic tissues would begin to generate more co The cardiovascular center would decrease sympathetic stimulation to the heart . None of the above. They are not mechanisms for reversing a drop in blood pressure 16. Rank the following components of the cardiovascular system according to their hydrostatic pressure gradient from bishest pressure to jaat pressursExplanation / Answer
Isovolumetric contraction- in cardiac physiology, isovolumetric contraction is an event occuring in early systole during which the ventricles contract with no corresponding volume change. This short lasting portion of the cardiac cycle takes place whilst all heart valves are closed.
Beta blockers are also known as beta- adrenergic blocking agents, and are medications that reduce blood pressure. Beta blockers work by blocking the effects of the hormone epinephrine, which is also known as adrenaline. When one takes beta blockers, heart beats more slowly and with less force, thereby reducing blood pressure.