Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam 2025 - Free Pharmacology Practice Questions and Study Guide

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By what mechanism is blood pressure primarily determined?

Heart rate and blood volume

Cardiac output and systemic vascular resistance

Cardiac output and systemic vascular resistance are primarily responsible for determining blood pressure. Heart rate and blood volume (choice A) can play a secondary role in certain situations such as exercise or dehydration, but they are not the main mechanisms affecting blood pressure. Blood viscosity and vessel elasticity (choice C) also have some influence on blood pressure, but they are not the primary determinants. Electrolyte balance and kidney function (choice D) can contribute to blood pressure regulation through the renin-angiotensin-aldosterone system, but they are not the primary mechanisms at play.

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Blood viscosity and vessel elasticity

Electrolyte balance and kidney function

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