Question

4. Propose two ways that the cardiovascular system would try to increase stroke volume in the case of heart failure

6. A person with bradycardia is given an EKG. The EKG shows no P waves but a normal QRS complex. How could you explain this observation?

8. If all calcium channels in plasma membranes of cardiac muscle were suddenly blocked, what would be the effect on the muscle’s action potentials and contraction?

9. A heart murmur is the audible noise generated when blood is allowed to flow through a heart valve when it shouldn’t. Based on your knowledge of the cardiac cycle, which valve(s) would you predict to cause a murmur during diastole, and which valve(s) would you predict to cause a murmur during systole? Be sure to explain your answer.

Answer 1

Question 4