Why is ventricular fibrillation fatal?
A) Ventricular fibrillation is fatal because the ventricles quiver and do not relax long enough to be filled with blood by the atria.
B) Ventricular fibrillation is fatal because the ventricles quiver and do not pump blood to the systemic circulation.
C) Ventricular fibrillation is fatal because the ventricles do not relax long enough for the coronary vessels to fill with blood for the coronary tissue to receive oxygen and nutrients.
D) Ventricular fibrillation is fatal because the heart is beating to an ectopic pacemaker and the rhythm is irregular.
E) Ventricular fibrillation is fatal because the heart rate slows significantly and blood flow and pressure decreases.
Answer: B
You might also like to view...
Which of the following is not a function of steroids?
A) They are a significant energy reserve for the body. B) They are structural components of the plasm membrane. C) They are involved in regulation of sexual function. D) They regulate tissue metabolism and mineral balance. E) They are required for normal processing of dietary fats.
The cell types of the alveoli include which of the following?
A) goblet cells B) pseudostratified, ciliated, and columnar epithelia C) mucus glands D) macrophages E) All of the answers are correct.
Which structures are responsible for creating a direct electrical connection between cardiac muscle cells?
A) gap junctions B) maculae adherens C) intercalated discs D) desmosomes E) fascia adherens
The reason it is more appropriate to call an erythrocyte a "formed element" rather than a "cell" is that erythrocytes
A. can form a rouleau when moving through a capillary. B. lack a nucleus and organelles. C. have lots of inclusion molecules. D. are actually dead. E. are not red.