Podcast
Questions and Answers
Which term describes the mass of cardiac muscle cells connected to each other via gap junctions?
Which term describes the mass of cardiac muscle cells connected to each other via gap junctions?
- Myocardium (correct)
- Calcium Channels
- Pacemaker Potential
- Automaticity
What allows action potentials at any cell in a myocardium to stimulate all the cells in the myocardium?
What allows action potentials at any cell in a myocardium to stimulate all the cells in the myocardium?
- Pacemaker Potential
- Automaticity
- Calcium Channels
- Gap Junctions (correct)
Which term refers to the ability of cardiac muscle to produce action potentials automatically without innervation?
Which term refers to the ability of cardiac muscle to produce action potentials automatically without innervation?
- Automaticity (correct)
- Calcium Channels
- Myocardium
- Pacemaker Potential
What initiates the pacemaker potential in cardiac muscle?
What initiates the pacemaker potential in cardiac muscle?
How are voltage-gated calcium channels in cardiac muscle different from those in skeletal muscle?
How are voltage-gated calcium channels in cardiac muscle different from those in skeletal muscle?
What term refers to the prevention of wave summation and tetanic contractions by cell membranes in cardiac tissue?
What term refers to the prevention of wave summation and tetanic contractions by cell membranes in cardiac tissue?
Which characteristic of cardiac tissue allows for contraction without neural stimulation and is controlled by pacemaker cells?
Which characteristic of cardiac tissue allows for contraction without neural stimulation and is controlled by pacemaker cells?
What aspect of the cardiac muscle allows for variable contraction tension and is controlled by the nervous system?
What aspect of the cardiac muscle allows for variable contraction tension and is controlled by the nervous system?
What is the main function of intercalated discs in cardiocytes?
What is the main function of intercalated discs in cardiocytes?
How do cardiac and smooth muscles behave?
How do cardiac and smooth muscles behave?
What is the structural difference between cardiac and skeletal muscle fibers?
What is the structural difference between cardiac and skeletal muscle fibers?
How do cardiac muscle cells generate contractions?
How do cardiac muscle cells generate contractions?
What type of junctions permit impulses to be conducted cell to cell in cardiac muscle fibers?
What type of junctions permit impulses to be conducted cell to cell in cardiac muscle fibers?
What is the primary energy metabolism in cardiac muscle cells?
What is the primary energy metabolism in cardiac muscle cells?
What makes the myocardium different from skeletal muscle?
What makes the myocardium different from skeletal muscle?
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