Some people have abnormal cords or bridges of myocardium that extend from atrium to ventricle, bypassing he AV node and other parts of the conduction system. How would you expect this to affect the cardiac rhythm?

Some people have abnormal cords or bridges of myocardium that extend from atrium to ventricle, bypassing he AV node and other parts of the conduction system. How would you expect this to affect the cardiac rhythm?

Body Structures & Functions Updated

13th Edition

ISBN:9780357191606

Author:Scott

Publisher:Scott

Chapter14: Circulation And Blood Vessels

Section: Chapter Questions

Problem 1RQ

See similar textbooks

Related questions

Q: Explain the conduction system of the heart. How heart rate is controlled in our body.

A: The conducting system of heart It is made of myocardium that is specialised for initiation and…

Q: Describe how the pressure in the left ventricle and in the systemic arteries varies during the…

A: The heart is a muscular organ that is divided into the left and right sides to prevent the mixing of…

Q: Fill in the blank: During ventricular relaxation, the A-V valves remain _______________________.

A: Cardiac cycle refers to sequence of alternating contraction and relaxation of the atria and…

Q: Why does the heart spend more time in diastole then in systole?

A: Diastole and systole are the two phases of the cardiac cycle. They occur as the heart beats and…

Q: Which side(s) of the heart would affected by high pressure in the pulmonary circuit? Which side(s)…

A: BASIC INFORMATION PULMONARY CIRCUIT the blood pumped by right ventricles enters into the pulmonary…

Q: An ECG measures a. changes in electrical potential during the cardiac cycle. b. Ca2+…

A: Introduction: ECG or electrocardiogram is a machine that helps analyse the condition of the heart.…

Q: Explain how an action potential occurs in cardiac contractile fibers.

A: The automatic rhythmicity of the heart is its ability to contract spontaneously and at regular rate.…

Q: Can the intraventricular septum prevents the electrical activity from stimulating the heart in a…

A: The intraventricular septum is present between two ventricles of the heart, generally preventing…

Q: Compare and contrast pressure and volume changes of the left ?and right ventricles and the aorta…

A: Answer: Introduction: The heart is present in the thoracic (Thorax) cavity medially among the lungs…

Q: What would be the drawback of cardiac contractions being the same duration as skeletal muscle…

A: Cardiac muscles are specialized in the way that long action potentials are generated in the cardiac…

Q: What is the importance and the physiology of the cardiac conduction system?

A: Cardiac conduction system is also known as the electrical conduction system of the heart. The…

Q: High pressure in the systemic and pulmonary circuits often results in ventricular enlarges to pump…

A: PULMONARY CIRCUIT The blood pumped by right ventricles enters into the pulmonary artery The left…

Q: Which of the following correctly ranks pressures during isovolumetric contraction of a normal…

A: A normal cardiac cycle is characterised by revenant atrial and cavity contractions and…

Q: Which of these is an incorrect statement concerning the heartbeat?a. The atria contract at the same…

A: The heartbeat has two parts, systole when the heart contracts and pumps blood and diastole when the…

Q: The length of the cardiac action potential, at 200-300 msec, is dependent upon the: plateau phase. O…

A: Action potential Sudden rise and fall in membrane voltage in a characteristic pattern.…

Q: What are the valves called that go from the ventricle to out of the heart?

A: The heart is a hollow, muscular organ primarily of cardiac muscles that functions as a pump to…

Q: Which of the four chambers of the human heart has the thickest muscular walls?

A: The cardiovascular system consists of the heart, blood, and blood vessels and is also known as the…

Q: Describe the events that occur during one cardiac cycle.

A: The cardiac cycle is a process that occurs in the heart. The process refers to the event that takes…

Q: During which of the following periods are the large elastic arteries distributing blood to smaller…

A: The cardiac cycle is referred to as one heartbeat that consists of one cycle of contraction and…

Q: Describe the cardiac cycle, and explain why heart valves open in onlyone direction.

A: Human heart is the Center for regulating blood across the body. It is made up of cardiac Muscles…

Q: Although not considered the primary pacemaker of the heart, the atrioventricular node can indeed be…

A: Human Heart is a four-chambered, fibro-muscular organ. There are two atria through which the heart…

Q: Describe one cardiac cycle,beginning with both atria and ventricle relaxed?

A: The cardiac cycle is referred to as one heartbeat that consists of one cycle of contraction and…

Q: The T wave represents: a. Depolarization of the ventricles b. Repolarization of the atria c.…

A: ECG (Electrocardiogram) can be outlined as the graph which represents the electrical activity of the…

Q: Describe the path of blood through the cardiac circuits

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

Q: Why is the cardiac action potential propagated more slowly in an AV node cell then in an atrial or…

A: Cardiac action potential It refers to the short alteration in the voltage i.e. membrane potential…

Q: What changes in cardiac function might you expect after surgical replacement of a defective heart…

A: The mammalian heart is a four chambered muscular organ with valves. The valve between the right…

Q: why a leaking heart valve may cause heart damage over time?

A: Leaky heart valve can affect any of the four heart valves: 1)Aortic valve ( left ventricle and…

Q: Explain the pathway of the conductions system in the Heart

A: The heart is a muscular organ consisting of four chambers. It consists of two upper chambers known…

Q: What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning…

A: Introduction Significance of atrioventricular node and atrioventricular bundle in the functioning of…

Q: The cardiac output of each ventricle is the same. Why is this? What would happen if the right…

A: The Cardiac Output is defined as the amount of blood that is pumped out by the two ventricles of the…

Q: The onset of the QRS complex of the ECG is most closely related to which of the following cardiac…

A: Isovolumetric ventricular contraction - This phase marks the beginning of systole and starts with…

Q: Explain why it is more efficient for contraction of the ventricles to beginat the apex of the heart…

A: To answer this question we should have knowledge of Physiology.

Q: Explain how the blood volume in the left ventricle changes throughout the cardiac cycle in response…

A: Answer: CARDIOVASCULAR SYSTEM : In all multicellular organisms there is a system which transports…

Q: Describe what happens to the chambers of the heart during diastole

A: Heart consists of four chambers to ventricles and two Atria. Diastole and systole are two phases of…

Q: The input and exit valves to the ventricles are located in a superior position to the lumen. What…

A: The heart is the organ that pumps the blood to the other parts of the body. The oxygenated blood…

Q: Phase C of the ventricular action potential is due to which of the following? otential (mV)

A: Ca+2 influx

Q: The blood vessels responsible for variably distributing cardiac output among organs in the body are:…

A: Animal physiology is the systematic study of the supporting features, roles, and processes of…

Q: Occasionally an ectopic pacemaker will develop in part of the conducting system of the heart. What…

A: An ectopic pacemaker is a collection of excitable cells located outside of the heart's typically…

Q: During what phase does blood flow from the ventricles into the pulmonary trunk and aorta?…

A: The recurring sequence of changes that takes place in each beat of the heart ( cardio dynamic events…

Q: If a person's right ventricle could only contract about half as forcefully as it normally could at…

A: The heart is the motor pump of the circulatory system. It is composed of two parts, which are again…

Q: What is the significance of atrio-ventricular node and atrio-ventricular bundlein the functioning of…

A: The heart is the most important organ in the body. It is made up of several different types of…

Q: Place these events in the correct order as they occur in the cardiac cycle: 1. Contraction of the…

A: Cardiac cycle Cardiac cycle is a term used to describe the relaxation and contraction that occur,…

Q: When you have a blockage of blood flow to the heart, it will likely result in what...?

A: Heart block is an abnormal heart rhythm where the heart beats too slowly,which results in the…

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

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

Figure 40.11 Which of the following statements about the heart is false? The mitral valve separates the left ventricle from the left atrium. Blood travels through the bicuspid valve to the left atrium. Both the aortic and the pulmonary valves are semilunar valves. The mitral valve is an atrioventricular valve.
When the SA node doesn’t function properly, the AV node takes over pacing the heart and produces what is known as a junctional rhythm. Explain why we don’t see P waves on the ECG of an individual with such a rhythm?
Why is it necessary for cells of the cardiac atria and ventricles to contract in a coordinated manner? How is this accomplished?
We analyzed the difference between the action potential of a cardiac contractile cell and an action potential in a neuron. Describe the physiological mechanisms behind the primary difference in the shape of these two action potentials. Why is this feature important to the normal workings of the heart?
High pressure in the systemic and pulmonary circuit often results in ventricular hypertrophy in which the ventricle enlarges to pump against the greater force. Which side(s) of the heart would affected by high pressure in the pulmonary circuit? Which side(s) of the heart would be affected by high pressure in the systemic circuit? Could you explain this answer? Thank you
What is the consequence of the prolonged plateau of depolarization in ventricular myocytes? a-it causes ventricular myocytes to contract for a longer time, allowing the ventricles time to empty b-it gives additional time for the atria to contract, filling the ventricles more completely c-it causes repolarization to be delayed which slows heart rate d-it allows the ventricles a moment to rest before completing contraction
Can the intraventricular septum prevents the electrical activity from stimulating the heart in a superior and inferior directional manner? Yes or No
In the given table, three of the anatomical and physiological terms are similar or related; one does not belong with the other three. Choose the term that does NOT belong in each of the following groups. A B C D 1 Pulmonary Trunk Vena Cava Right Side of the Heart Left Side of the Heart 2 QRS Wave T Wave P Wave Electrical Activity of the Ventricles 3 AV Valves Closed AV Valves Opened Ventricular Systole Semilunar Valves Open 4 Tricuspid Valve Mitral Valve Bicuspid Valve Left AV Valve 5 Pulmonary Valve Umbilical Artery Pulmonary Vein Superior Vena Cava
Which of the following channels is responsible for generating the long plateau found in the action potentials of ventricular myocytes? a-slow Na+ channels b-slow Ca2+ channels c-leaky Ca2+ channels d-leaky Na+ channels
Why doesn't shortening the diastolic time decrease ventricular filling and thus decrease cardiac output?
Although not considered the primary pacemaker of the heart, the atrioventricular node can indeed be considered as playing SOME role in setting the rhythm of the heart (kind of a secondary pacemaker). Explain how/why.