Human Anatomy & Physiology
1st Edition
ISBN: 9780805382952
Author: Erin C. Amerman
Publisher: PEARSON
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Textbook Question
Chapter 17.2, Problem 9QC
Why do you think it is important to ensure via heart valves that blood flows in only one direction in the heart?
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Why do you think it is important for heart valves to ensure that blood flows in only one direction in the heart?
How does the fact that cardiac muscle does not undergo tetanus (as skeletal muscle does) affect the functioning of the heart?
Which of the following statements regarding heart valves is NOT true?
a) They are flaplike structures.
Ob) There are four valves in the heart.
Oc) They prevent backflow of blood.
d) They must remain tightly closed in order to work properly.
Chapter 17 Solutions
Human Anatomy & Physiology
Ch. 17.1 - Where is the heart located, and how large is it?Ch. 17.1 - What are the hearts upper and lower chambers...Ch. 17.1 - 3. From what sources does blood flow into the...Ch. 17.1 - 4. Which side of the heart is considered the...Ch. 17.1 - Which side of the heart is considered the systemic...Ch. 17.2 - Prob. 1QCCh. 17.2 - Prob. 2QCCh. 17.2 - 3. What are the three layers of the heart wall,...Ch. 17.2 - 4. What are the four main great vessels? From...Ch. 17.2 - How do the right and left ventricles differ in...
Ch. 17.2 - 6. Why do you think it is important to ensure via...Ch. 17.2 - 7. What is the overall pathway of blood flow...Ch. 17.2 - Prob. 4QCCh. 17.2 - Prob. 5QCCh. 17.2 - Prob. 6QCCh. 17.3 - How do pacemaker and contractile cells differ?...Ch. 17.3 - 2. What are intercalated discs? What is their...Ch. 17.3 - Prob. 5QCCh. 17.3 - Prob. 6QCCh. 17.3 - What is the sequence of events of a contractile...Ch. 17.3 - How does the refractory period of cardiac muscle...Ch. 17.3 - 7. What does an ECG record?
Ch. 17.3 - What are the five waves in an ECG, and what do...Ch. 17.4 - What causes the heart sounds S1 and S2?Ch. 17.4 - Prob. 2QCCh. 17.4 - Prob. 3QCCh. 17.4 - Is the end-diastolic or the end-systolic volume of...Ch. 17.4 - 5. Walk through the mechanical events of the...Ch. 17.4 - How do the ECG waves correlate with each part of...Ch. 17.4 - 7. How does the left ventricular pressure...Ch. 17.5 - Prob. 1QCCh. 17.5 - What is cardiac output? How does it relate to...Ch. 17.5 - Prob. 3QCCh. 17.5 - What is the Frank-Starling law, and how does it...Ch. 17.5 - What is a chronotropic agent?Ch. 17.5 - Prob. 6QCCh. 17.5 - 7. What effects does the parasympathetic nervous...Ch. 17.5 - How would a hormone that decreases the amount of...Ch. 17.5 - How is heart failure defined?Ch. 17 - 1. Mark the following statements as true or false....Ch. 17 - 2. The pericardial cavity is located between:
a....Ch. 17 - 3. Which of the following statements is true?
a....Ch. 17 - Match the following terms with the correct...Ch. 17 - Fill in the blanks: The coronary arteries are the...Ch. 17 - 6. How do pacemaker cardiac muscle cells differ...Ch. 17 - 7. Cardiac muscle cells are joined by structures...Ch. 17 - Prob. 8CYRCh. 17 - Prob. 9CYRCh. 17 - 10. The _________is the primary pacemaker of the...Ch. 17 - The AV node delay: a. allows the atria and...Ch. 17 - Explain what each of the following terms...Ch. 17 - 13. Mark the following statements as true or...Ch. 17 - Prob. 14CYRCh. 17 - 15. Fill in the blanks: The first heart sound is...Ch. 17 - Cardiac output is equal to: a. end-diastolic...Ch. 17 - Prob. 17CYRCh. 17 - 18. Which of the following statements is false?
a....Ch. 17 - 1. A birth defect called transposition of great...Ch. 17 - 2. Predict which would be more damaging to...Ch. 17 - 3. When the SA node doesn’t function properly, the...Ch. 17 - Prob. 4CYUCh. 17 - Prob. 1AYKACh. 17 - You are a nursing student in a hospital, and a...Ch. 17 - Prob. 3AYKACh. 17 - Prob. 4AYKB
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the correct sequence for flow of blood in the heart? o Superior vena cava → right ventricle > right atrium o Pulmonary vein > left atrium → bicuspid valve o Right atrium → mitral valve → right ventricle o Inferior vena cava > left atrium > left ventricle o Right ventricle > aortic semilunar valve → aortaarrow_forwardWhich of the following statements concerning the heart is TRUE? A) The SA node is located in the interventricular septum B) The bundle of His is located in the interventricular septum C) The Purkinje fibers stimulate the ventricles in a superior to inferior direction D) Both A & C E) All of the abovearrow_forwardWhat is the function of the heart? Explain.arrow_forward
- Why should we maintain a patient in a compensated heart failure state?arrow_forwardWhat is the role of one-way valves in the return of blood to the heart?arrow_forwardWhich of the following statements about the heart is TRUE? A) The sinoatrial node generates the fastest action potentials in the heart B) The parasympathetic branch of the nervous system decreases heart rate C) The sinoatrial node passes the action potentials to the AV node D) Both B & C E) All of the abovearrow_forward
- Why is the left side of the heart larger than the right?arrow_forwardI receive blood coming back to the heart from the systemic circuit. What am I? _____________ My job is to prevent the back flow of blood from the left ventricle to the right atrium when the ventricles contract. What am I? _____________ My job is to prevent the back flow of blood from the aorta to the left ventricle when the ventricles relax.What am I? ___________ I return blood from the myocardium to the right atrium. What am I? ___________ I am the pump for the pulmonary circuit. What am I? ____________ I am the pump for the systemic circuit. What am I? ____________ Word Options for Blank: aorta aortic valve bicuspid valve coronary sinus inferior vena cava left atrium left ventricle pulmonary arteries pulmonary trunk pulmonary valve pulmonary veins right atrium right ventricle superior vena cava tricuspid valvearrow_forwardHow can you distinguish the left and right sides of the heart based on your views of the myocardium of the left and right ventricle?arrow_forward
- If the vagal nerves to the heart were cutthe result would be that A) the heart would stop, since the vagal nerves trigger the heart to contract B) the AV node would become the pacemaker of the heart D) the heart rate would not be affected E) the heart rate would increasearrow_forward40- In the brain the frontal lobe has Oa. Voluntary motor activity Ob. Speaking Oc. Reasoning Od. Problem solving Oe. All of the abovearrow_forwardThe Greek anatomist Erasistratus, originally from Ceos, identified the correct function of the right atrioventricular valve of the human heart, which was to prevent backward flow of blood from: the right ventricle to the right atrium the right ventricle to the left ventricle the right ventricle to the left atrium the left ventricle to the right ventricle the left ventricle to the left atriumarrow_forward
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