Beta blockers are commonly prescribed medications for angina, hypertension and dysrhythmia that exert the following effects:

Question

BlackTom AI · Accepted Answer

The question asks about the effects of beta blockers that are commonly prescribed for angina, hypertension, and dysrhythmia.
Option a: 'lower heart rate' — Beta-1 blockade in the heart reduces sympathetic stimulation, which slows the SA node firing and lowers heart rate. This is a well-established effect and contributes to reduced myocardial oxygen demand in angina and helps control rate in certain dysrhythmias.
Option b: 'lower myocardial contractility' — In addition to heart rate effects, beta-1 blockade also decreases calcium-mediated contractility of cardiac muscle, leading to reduced stroke volume and myocardial oxygen consumption. This negative inotropic effect is characteristic of non-vasodilating beta blockers and assists in managing hypertension and angina symptoms.
Option c: 'lower blood pressure' — The blood pressure-lowering effect arises from multiple mechanisms: reduced cardiac output due to decreased heart rate and contractility, and diminished renin release from the kidneys via beta-1 blockade, which lowers angiotensin II–mediated vasoconstriction. This is a central therapeutic goal in hypertension management.
Option d: 'all of the above' — Given that each of the statements a, b, and c describes a recognized pharmacodynamic effect of beta blockers, their combined actions cover the common clinical indications listed (angina, hypertension, dysrhythmia). The presence of all three effects is consistent with these medications' profile.
In summary, understanding that beta blockers can reduce heart rate, decrease myocardial contractility, and lower blood pressure helps explain their utility across angina, hypertension, and rhythm disorders. The option that integrates these effects reflects the comprehensive impact of this drug class.

Dashboard End-semester final theory exam

Beta blockers are commonly prescribed medications for angina, hypertension and dysrhythmia that exert the following effects:

查看解析

登录即可查看完整答案

类似问题

Which type of drug reduces anxiety and tremors and is banned in sports like archery and shooting?

Which one of the following drugs will block the action of adrenaline?

Question at position 65 ______________ decrease the activation of the sympathetic nervous system and reduce blood pressure and afterload.DigoxinARBsACE inhibitorsDiureticsBeta blockers

Blockade of beta-1 receptors will have what effect on cardiac output?

Beta-blockers are prescribed to reduce the frequency of cardiac arrhythmias. They do this by:

_______________ blocking agents produce bradycardia.

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单