Explanation A pacemaker is a medical machine that is situated at the top of the heart's right atrium to help control abnormal (or unusual) heart rates. This machine utilizes electrical pulses to imply the heart to beat (or vibrate) at a normal rate. The pacemaker is used to treat arrhythmias. Arrhythmias are the problem with the rhythm or rate of the heartbeat. The natural pacemaker of the heart is SA node...

Laboratory Manual For Human Anatomy & Physiology

4th Edition

ISBN: 9781260159363

Author: Martin, Terry R., Prentice-craver, Cynthia

Publisher: McGraw-Hill Publishing Co.

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Question

Chapter 45, Problem 3.1A

Summary Introduction

To fill:

The correct term in the given blank.

Introduction:

In most animals, the heart is a muscular organ which pumps blood via circulatory system throughout the body. Blood gives oxygen and nutrients to the body, and removes metabolic wastes. The heart is placed just behind and moderately left of the sternum (breastbone) in humans.

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Chapter 45, Problem 2.2A

Chapter 45, Problem 3.2A

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Chapter 45 Solutions

Laboratory Manual For Human Anatomy & Physiology

Ch. 45 - The _______ of the conduction system is known as...Ch. 45 - The ________ of the conduction system is/are...Ch. 45 - The first of two heart sounds (lubb) occurs when...Ch. 45 - One cardiac cycle would consist of a. left chamber...Ch. 45 - The SA node of the heart is located in the a....Ch. 45 - The depolarization of ventricular fibers is...Ch. 45 - The dupp sound occurs when the semilunar valves...Ch. 45 - The P wave of an ECG occurs during the...Ch. 45 - The period during a heart is contracting is called...Ch. 45 - The period during which a heart chamber is...

Ch. 45 - During ventricular contraction, the AV valves...Ch. 45 - During ventricular relaxation, the AV valves are...Ch. 45 - The pulmonary and aortic valves open when the...Ch. 45 - The first sound of a cardiac cycle occurs when the...Ch. 45 - The second sound of a cardiac cycle occurs when...Ch. 45 - The sound created when blood leaks back through an...Ch. 45 - What changes did you note in the heart sounds when...Ch. 45 - What changes did you note in the heart sounds...Ch. 45 - Prob. 3.1A Ch. 45 - The ____________________ node is located in the...Ch. 45 - The fibers that carry cardiac impulses from the...Ch. 45 - Prob. 3.4A Ch. 45 - The P wave corresponds to depolarization of the...Ch. 45 - The QRS complex corresponds to depolarization of...Ch. 45 - The T wave corresponds to repolarization of the...Ch. 45 - Why is atrial repolarization not observed in the...Ch. 45 - Identify the heart chambers and conduction system...Ch. 45 - How much time passed from the beginning of the P...Ch. 45 - What is the significance of this P-R interval?Ch. 45 - How can you determine heart rate from an...Ch. 45 - As blood in the ventricles surges back against the...

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Solution Summary: The author explains that the heart is a muscular organ that pumps blood via circulatory system throughout the body. The pacemaker is used to treat arrhythmias.

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Chapter 45 Solutions