Phase 4 28. Two electrodes are in the bathing electrolyte solution at a substantial distance from each other when the cardiac muscle fiber is stimulated. One electrode of a set of two electrodes is inserted into the interior of a cardiac muscle fiber that is being bathed in a super saturated KCl solution while the other electrode remains in the bathing solution. Both electrodes are inserted into the cardiac muscle fiber while the fiber is at rest. The blood flow in the skeletal muscles should increase tremendously during vigorous treadmill exercise.
Local metabolites dilate skeletal muscle blood vessels.
Total peripheral resistance increases. A 50 cm strip of an aorta having no branches was isolated and clamped at both ends. The pressure in this aorta was 60 mmHg before and 110 mmHg after the injection of 5 ml of blood. What is the elastance is this aortic segment under the conditions noted. An elderly man treated for congestive heart failure for years with digitalis and furosemide dies of pulmonary edema.