In a healthy young adult, what happens to cardiacoutput when heart rate increases above 160 bpm?a. It increases.b. It decreases.c. It remains constant.d. There is no way to predict

Decreasing blood pressure to the Aortic Arch & Carotid Sinuses should reflexly: decrease heart rate & increase stroke volume increase vascular resistance & decrease heart rate decrease stroke volume & decrease vascular resistance A. B. C. D. increase cardiac output & increase vascular resistance Using the Baro-receptor feedback mechanism, the parasysmpathetic nervous system can affect which of the following variables to adjust blood pressure? A. heart rate stroke volume vascular resistance B. C. D. contractility An individual possessing only the A & B antigens is said to be of which blo fype? A. A+ В. AB+ С. AB- D.

1. In ventricular fibrillation, there is no pattern visible in the EKG. What does this mean in terms of contraction? A. contraction will have no visible pattern either and the ventricles will be unable to eject much blood B. the pattern doesn't matter; contraction of the ventricles will not be affected as long as ventricular myocytes continue to depolarize and depolarize C. the ventricular myocytes will be unable to contract C. contraction will become constant and ventricles will be unable to fill with blood   2. Which structure follows depolarization of the SA Node and atria in the cardiac conduction system? A.ventricular myocytes B.AV Node C.left and right bundle branches D.AV bundle E Purkinje fibers   3. Hypertension increases afterload for the heart which in turn  A. increases Stroke Volume B. decreases Stroke Volume C.increases Cardiac Output D.increases Venous Return

Which of the following tissues/organs would experience an increase in blood flow from transition from rest to exercise?   a. Skeletal muscle   b. Heart   c. Kidneys   d. The brain   e. Skin