Laboratory Manual for Human Anatomy & Physiology (Cat Version)
4th Edition
ISBN: 9781259864612
Author: Martin
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 45, Problem 1.6A
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.
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The _______________________ normally controls the heart rate.
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The second sound of a cardiac cycle occurs when the _______________________ are closing.
Chapter 45 Solutions
Laboratory Manual for Human Anatomy & Physiology (Cat 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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- 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: The first sound of a cardiac cycle occurs when the _______________________ are closing.arrow_forward_________________ is a type of cardiac glucoside thatincreases the force of cardiac contraction.arrow_forward
- Fill in the blank: A pulse that feels full and is not easily compressed is produced by an elevated _______________________.arrow_forwardDuring exercise, the regulation of blood flow to the skeletal muscle occurs at the____________. Group of answer choices Aorta Vena Cava arterioles venuolesarrow_forwardThe left ____________________________ can often be seen superior to the aortic arch as it courses horizontally towards the _____.arrow_forward
- The blood enters the heart from the ___________ through the vena cava. It enters the_____________ _____________, travels through the _____________ ____________ andflows into the right ____________.• The muscle surrounding the right ventricle _____________, pushing blood through the______________ _____________.• Blood then travels to the lungs through the ___________ ________.• Here it exchanges carbon dioxide for _____________. The blood then flows back to theheart through the ______________ ______ into the _______ _______.• Once the left atrium fills with blood, the ___________ ________ opens to allow blood intothe ________ __________.• The left ventricle then contracts, pushing blood through the _____________ ___________into the _____________.• From here, oxygen rich blood is circulated around the body, giving ________ and nutrientsto cells.arrow_forwardFill in the blank: Normally, the _______________________ node serves as the pacemaker of the heart.arrow_forwardFill in the blank: The QRS complex corresponds to depolarization of the muscle fibers of the _______________________.arrow_forward
- ____________ structures such as the ascending aorta are seen to the _____________ of the image while __________________ structures such as the descending aorta are seen to the __________ of the image.arrow_forwardFill in the blank: The period during which a heart chamber is contracting is called _______________________.arrow_forwardFill in the blank: The cardiac control center is located in the _______________________ of the brain stem.arrow_forward
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