Podcast
Questions and Answers
What type of muscle fibers are present in the myocardium?
What type of muscle fibers are present in the myocardium?
- Non-striated muscle with features of smooth muscle
- Striated muscle with features of smooth muscle (correct)
- Cardiac muscle with features of smooth muscle
- Smooth muscle with features of cardiac muscle
What initiates the action potential within the heart?
What initiates the action potential within the heart?
- Autorhythmic cells (correct)
- Pacemaker cells
- Conducting fibres
- Mitochondria
What is the basic rate of action potential generation within the heart?
What is the basic rate of action potential generation within the heart?
- 40-60 bpm
- 160-180 bpm
- 120-140 bpm
- 80-100 bpm (correct)
Which phase of the heartbeat involves the relaxation of heart muscles and allows the chambers to fill with blood?
Which phase of the heartbeat involves the relaxation of heart muscles and allows the chambers to fill with blood?
Which structure prevents valve cusps from billowing into the atria during contraction?
Which structure prevents valve cusps from billowing into the atria during contraction?
Which component of the cardiovascular system is described as weighing around 300g and beating around 100,000 times a day?
Which component of the cardiovascular system is described as weighing around 300g and beating around 100,000 times a day?
What is the purpose of the pericardium in relation to the heart?
What is the purpose of the pericardium in relation to the heart?
In groups, one of the tasks is to draw and label the structure of the _____________.
In groups, one of the tasks is to draw and label the structure of the _____________.
What is the innermost layer of tissue that lines the chambers of the heart known as?
What is the innermost layer of tissue that lines the chambers of the heart known as?
The successful student should be able to describe the mechanism of ____________ contraction by the end of the lecture and appropriate independent study.
The successful student should be able to describe the mechanism of ____________ contraction by the end of the lecture and appropriate independent study.
What is the approximate weight of the heart?
What is the approximate weight of the heart?
How many times does the heart beat in a lifetime?
How many times does the heart beat in a lifetime?
Which system of the blood vessels is not mentioned in the lecture?
Which system of the blood vessels is not mentioned in the lecture?
What surrounds the heart?
What surrounds the heart?
What is the innermost layer of tissue that lines the chambers of the heart called?
What is the innermost layer of tissue that lines the chambers of the heart called?
What is the role of autorhythmic cells within the heart?
What is the role of autorhythmic cells within the heart?
In the context of heart muscle valves, how many leaflets does the bicuspid valve have?
In the context of heart muscle valves, how many leaflets does the bicuspid valve have?
During which phase of the heartbeat does the heart muscle contract and pump blood from the chambers into the arteries?
During which phase of the heartbeat does the heart muscle contract and pump blood from the chambers into the arteries?
What is the function of the chordae tendinae within the heart?
What is the function of the chordae tendinae within the heart?
How do the muscle fibres in the cardiac muscle differ from skeletal muscle fibres?
How do the muscle fibres in the cardiac muscle differ from skeletal muscle fibres?
