6. Wh ich of the following correctly gives the sequence of of th e heart? (Ignor
ID: 3479131 • Letter: 6
Question
6. Wh ich of the following correctly gives the sequence of of th e heart? (Ignore sites that are not mentioned) a. Left atria, right atria, Purkinje fibers, ventricle D. Atria, AV node, ventricular septum, Bundle of His activation of portions lundie of lis, bunadin le ahehie ventmicnei Purkinje fibers, ventride e. Bundle of His, ventricle, AV node, atria ventricle Which of the following statements about red blood cells, plasma and blood is true? whole a. In the microcirculation, hematocrit ratios above 50% cause filtration down the length of the capillary b. The viscosity of plasma is dependent on plasma flow c Red cells tend to migrate away from the center, toward the wall of the blood vessel despite the no slip condition. d. Red cells are not deformable. e. Red cells do not contain proteins. 8. Ventricular fibrillation results in which of the following a. increased stroke volume b. decreased end-diastolic volume c. ineffective ventricular filling d. ventricular hypertrophy e. atrial fibrillation Blood pressure and heart rate are measured in a patient to be 200 mmHg systolic pressure and 110mmHg diastolic pressure with an average heart rate of 100 beats per minute. Which medication will reduce blood pressure and heart rate? 9 a, beta blocker b. angiotensin converting enzyme c. enhanced norepinephrine release d. cyclic AMP stimulant 10. Suddenly a patient begins hemorrhaging. Which of the following bodily responses will compensate and improve arterial blood pressure? The contraction of arterioles increases transfer of interstitial fluid to the vascular system. The decrease in aldosterone secretion increases arteriolar contraction a. b. c. Release of renin increases renal loss of sodium and water. d. The increase in unstressed volume increases cardiac output. e. The increased right atrial pressure decreases cardiac outputExplanation / Answer
Answer: d. Bundle of His, bundle branches, terminal Purkinje fibers, ventricle.
The sequence of events that that take place during the cardiac cycle is as follows:
The initial stimulas of contraction originates from the sinoartrial node (SA node) located within the wall of the right artrium of the heart. The wave of excitation from the sinoartrial node (SA node) pass through the path; Artria - Artrioventricular node (AV node) - Bundle of His - Artrioventricular septum - Purkinje fibers - Ventricles.
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