Circulation of Blood & Cardiovascular Physiology Quiz

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Name three physiological properties of the heart.

Cardiac contractility, control of cardiac output, and features of cardiac muscle.

What are the functions of the cardiovascular system?

Bulk flow of materials (gases, nutrients, hormones, waste), temperature regulation, homeostasis, host defense, and reproduction.

What are the three main components involved in the regulation and integration of the cardiovascular system?

Heart, autonomic nerves, and blood vessels.

What does the CNS integrate with the overall activity of the cardiovascular system?

Activity and functions of the respiratory and renal systems. Signup and view all the answers

What does the circulation of blood involve?

Physiological properties of the heart, vasculature, microcirculation, control of blood pressure, control of blood volume, and exercise and blood flow through special regions. Signup and view all the answers

What is the ultimate function of the cardiovascular system?

To ensure adequate blood flow through the capillaries of various organs. Signup and view all the answers

What is the normal path of blood flow in the body?

Pulmonary circulation and systemic circulation. Signup and view all the answers

What are the features of the microcirculation?

Arterioles, precapillary sphincters, capillaries, venules. Signup and view all the answers

What are the valves of the heart and their locations?

Atrioventricular (cuspid) valves: Tricuspid valve between right atrium and right ventricle, Bicuspid (mitral) valve between left atrium and left ventricle. Semiluminar valves: Aortic valve between left ventricle and aorta, Pulmonary valve between right ventricle and pulmonary trunk. Signup and view all the answers

What are the features of cardiac muscle?

Striated, connected via intercalated discs, electrical connection through gap junctions, desmosomes for strong adhesion, functional syncytium. Signup and view all the answers

What is the role of L-type dihydropyridine channels in cardiac muscle contraction?

L-type dihydropyridine channels open in response to an action potential and allow calcium ions to enter the cardiac muscle cells, triggering contraction. Signup and view all the answers

How does the diameter of cardiac T-tubules compare to skeletal muscle T-tubules?

Cardiac T-tubules are 5 times greater in diameter than skeletal muscle T-tubules. Signup and view all the answers

What is the function of mucopolysaccharides in cardiac T-tubules?

Mucopolysaccharides in cardiac T-tubules sequester calcium ions, regulating their release and preventing excessive contraction. Signup and view all the answers

What is the role of dihydropyridine (DHP) activation in cardiac muscle contraction?

DHP activation causes the release of calcium ions from the sarcoplasmic reticulum via ryanodine release channels, which further enhances muscle contraction. Signup and view all the answers

How does the extrinsic sympathetic nervous system affect cardiac muscle contractility?

The extrinsic sympathetic nervous system increases cardiac muscle contractility by releasing norepinephrine, which stimulates beta-adrenergic receptors on the cardiac muscle cells. Signup and view all the answers

What is the relationship between the electrical activity of the heart and the mechanical events of the cardiac cycle?

The electrical activity of the heart, as measured by the electrocardiogram, precedes and coordinates the mechanical events of the cardiac cycle, including atrial and ventricular contraction and relaxation. Signup and view all the answers

How do cardiac volume/pressure diagrams differ between the left and right sides of the heart?

On the left side of the heart, the volume/pressure diagram shows higher pressures and smaller volumes compared to the right side. Signup and view all the answers

What is the refractory period in the context of cardiac muscle contraction?

The refractory period is a period of time after a cardiac muscle cell has depolarized and contracted, during which it is unresponsive to further stimulation. Signup and view all the answers

What are the main events of the cardiac cycle?

The main events of the cardiac cycle include atrial and ventricular contraction (systole) and relaxation (diastole), as well as the opening and closing of the heart valves. Signup and view all the answers

What is the role of the sympathetic nervous system in regulating cardiac output?

The sympathetic nervous system increases cardiac output by increasing heart rate and contractility, as well as constricting peripheral blood vessels to redirect blood flow to vital organs. Signup and view all the answers

Circulation of Blood & Cardiovascular Physiology Quiz

Choose a study mode

Podcast

Questions and Answers

Name three physiological properties of the heart.

What are the functions of the cardiovascular system?

What are the three main components involved in the regulation and integration of the cardiovascular system?

What does the CNS integrate with the overall activity of the cardiovascular system?

What does the circulation of blood involve?

What is the ultimate function of the cardiovascular system?

What is the normal path of blood flow in the body?

What are the features of the microcirculation?

What are the valves of the heart and their locations?

What are the features of cardiac muscle?

What is the role of L-type dihydropyridine channels in cardiac muscle contraction?

How does the diameter of cardiac T-tubules compare to skeletal muscle T-tubules?

What is the function of mucopolysaccharides in cardiac T-tubules?

What is the role of dihydropyridine (DHP) activation in cardiac muscle contraction?

How does the extrinsic sympathetic nervous system affect cardiac muscle contractility?

What is the relationship between the electrical activity of the heart and the mechanical events of the cardiac cycle?

How do cardiac volume/pressure diagrams differ between the left and right sides of the heart?

What is the refractory period in the context of cardiac muscle contraction?

What are the main events of the cardiac cycle?

What is the role of the sympathetic nervous system in regulating cardiac output?

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Circulation of Blood &amp; Cardiovascular Physiology Quiz

Choose a study mode

Podcast

Questions and Answers

Name three physiological properties of the heart.

What are the functions of the cardiovascular system?

What are the three main components involved in the regulation and integration of the cardiovascular system?

What does the CNS integrate with the overall activity of the cardiovascular system?

What does the circulation of blood involve?

What is the ultimate function of the cardiovascular system?

What is the normal path of blood flow in the body?

What are the features of the microcirculation?

What are the valves of the heart and their locations?

What are the features of cardiac muscle?

What is the role of L-type dihydropyridine channels in cardiac muscle contraction?

How does the diameter of cardiac T-tubules compare to skeletal muscle T-tubules?

What is the function of mucopolysaccharides in cardiac T-tubules?

What is the role of dihydropyridine (DHP) activation in cardiac muscle contraction?

How does the extrinsic sympathetic nervous system affect cardiac muscle contractility?

What is the relationship between the electrical activity of the heart and the mechanical events of the cardiac cycle?

How do cardiac volume/pressure diagrams differ between the left and right sides of the heart?

What is the refractory period in the context of cardiac muscle contraction?

What are the main events of the cardiac cycle?

What is the role of the sympathetic nervous system in regulating cardiac output?

More Like This

Circulation of Blood and Cardiovascular Physiology Quiz

Heart Structure and Function Quiz

Cardiovascular Physiology Quiz

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Circulation of Blood & Cardiovascular Physiology Quiz