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Human Biology (MindTap Course List)

11th Edition
Cecie Starr + 1 other
ISBN: 9781305112100

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BuyFindarrow_forward

Human Biology (MindTap Course List)

11th Edition
Cecie Starr + 1 other
ISBN: 9781305112100
Textbook Problem

Blood pressure is __________.

  1. a. generated by heart contractions
  2. b. exerted against vessel walls
  3. c. healthiest when it is under 120/80
  4. d. all of these are correct

Summary Introduction

Introduction: The cardiovascular system, which is also known as circulatory system, allows the blood to flow throughout the body and transports nutrients, gases, and other important enzymes in and out of the cells. The cardiovascular system is composed of two components, namely the heart and the blood vessels. The three types of the blood vessels are arteries, veins, and capillaries.

Explanation

Reason for the correct answer:

Option a. is given as “generated by heart contractions”.

The pressure exerted by the circulating blood against the blood vessel wall is called as blood pressure. The heart contractions generate the blood pressure. The blood pressure is measured in millimeters of mercury (mmHg). The blood pressure is normally expressed as systolic pressure over diastolic pressure.

Hence, the correct answer is option a.

Reasons for incorrect answers:

Option b. is given as “exerted against vessel walls”.

Blood pressure is not exerted against vessel walls...

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