Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam

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Ace your pharmacology exams with "Pharmacology and the Nursing Process" Packed with challenging quizzes based on the renowned textbook Pharmacology and the Nursing Process by Linda Lane Lilley (ISBN: 978-0323827973), it's the perfect tool to test your knowledge and prepare for success.

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By what mechanism is blood pressure primarily determined?

  1. Heart rate and blood volume

  2. Cardiac output and systemic vascular resistance

  3. Blood viscosity and vessel elasticity

  4. Electrolyte balance and kidney function

The correct answer is: 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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