Laboratory Manual for Human Anatomy & Physiology Main Version
4th Edition
ISBN: 9781260159110
Author: Terry Martin
Publisher: Mcgraw-hill Higher Education (us)
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Textbook Question
Chapter 45, Problem 1.7A
The second sound of a cardiac cycle occurs when the _______________________ are closing.
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The _______________________ normally controls the heart rate.
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The first sound of a cardiac cycle occurs when the _______________________ are closing.
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An _______________________ is a recording of electrical changes occurring in the myocardium during a cardiac cycle.
Chapter 45 Solutions
Laboratory Manual for Human Anatomy & Physiology Main Version
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. 3.1ACh. 45 - The ____________________ node is located in the...Ch. 45 - The fibers that carry cardiac impulses from the...Ch. 45 - Prob. 3.4ACh. 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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- _________________ is a type of cardiac glucoside thatincreases the force of cardiac contraction.arrow_forwardFill in the blank: The sound created when blood leaks back through an incompletely closed valve is called a_______________________.arrow_forwardDuring exercise, the regulation of blood flow to the skeletal muscle occurs at the____________. Group of answer choices Aorta Vena Cava arterioles venuolesarrow_forward
- One of the most common heart conditions in the United States is valvular disease. Diseased valves are often described as “leaky” because they allow blood to regurgitate or flow backward. The most commonly impacted valve is the aortic semilunar valve. Explain why a “leaky” aortic semilunar valve would be detrimental to patients. _________________________________________________________________________________________________________________arrow_forwardFill in the blank: A pulse that feels full and is not easily compressed is produced by an elevated _______________________.arrow_forwardThe left ____________________________ can often be seen superior to the aortic arch as it courses horizontally towards the _____.arrow_forward
- Fill in the blank: The cardiac control center is located in the _______________________ of the brain stem.arrow_forwardFill in the blank: The period during which a heart chamber is contracting is called _______________________.arrow_forwardThe ____________ nerves innervate the heart and tend to reduce the heart rate.arrow_forward
- The AV node fires, traveling down the Bundle of His Branches and to the Purkinje Fibers. This causes the _______________ to contract.arrow_forwardThe great cardiac vein and anterior interventricular artery can be found along the anterior _____________ sulcus.arrow_forwardAs the patient’s blood pressure decreased from the loss of blood, neural impulses transmitted from to the vasomotor and cardiac centers in the medulla (decreased____________; increased_____________).arrow_forward
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