16 Questions
What is the main function of the heart?
To pump blood to the body and receive blood from the body
Which type of tissue makes up the majority of the heart?
Cardiac muscle
What is the role of blood vessels in the cardiovascular system?
Passageways for blood distribution and material exchange
What is the function of blood in the body?
Transporting dissolved and suspended materials
What is the function of the pulmonary circuit?
To pick up oxygen and remove carbon dioxide from the blood
Which pathway does deoxygenated blood take through the heart, starting from the right side?
Right ventricle to pulmonary trunk to pulmonary arteries
What is the function of the atrio-ventricular valves in the heart?
To allow blood flow into ventricles when atrial pressure exceeds ventricular pressure
What is the role of the semi-lunar valves in the heart?
To open during ventricular pumping to allow blood to exit the heart
What is the function of chordae tendinae and papillary muscles in relation to heart valves?
To prevent valve eversion (flipping backwards)
What type of nervous system acts as an 'accelerator' for the heart?
Sympathetic nervous system
What is the main function of the intrinsic conduction system in the heart?
To initiate muscle action potentials in cardiac cells
What is the function of the systemic circuit in the circulatory system?
To deliver oxygenated blood to body tissues
What is the role of semi-lunar valves during ventricular relaxation?
They prevent backflow of blood during ventricular relaxation
How many cusps does a bicuspid valve have?
Two cusps
What is the role of autonomic innervation in cardiac muscle cells?
To control heart rate and rhythm
What structures ensure one-way flow of blood through the heart?
Atrio-ventricular valves and semi-lunar valves
Test your knowledge of cardiac physiology, including heart anatomy, electrical activity of the heart, cardiac cycle, and cardiac output. Learn about the cardiovascular system and its role in maintaining blood pressure and blood flow throughout the body.
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