Which of the following best describes the primary role of resistance vessels? Group of answer choices a.Providing nutrient supply to the walls of larger vessels b. They regulate arterial blood pressure and blood flow within the organs. c. Ensuring blood storage during periods of low cardiac output d. Directing blood flow to specific organs based on demand

The movement of which two ions is responsible for maintaining the plateau phase of the action potential of contractile cardiac muscle cells? Select one: a. Ca2+ and Na+ b. Ca2+ and K+ c. Na+ and Cl- d. Na+ and K+ e. K+ and Cl-

Which of the following answers explain why blood pressure increases?    Question  options: A Blood pressure increases with increased blood volume  B Blood pressure increases with increased vessel compliance  C Blood pressure increases with decreased vessel compliance  D Blood pressure decreases with incre3asing blood volume

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

Heart failure occurs when   a. the cardiac output is 15 liters per minute when you are watching television   b. the cardiac output is 5 liters per minute when you are running as fast as  you can on the treadmill.    c. the cardiac outout does not change based on the energy expenditure   d. all of the above

which of the following is TRUE for a cardiac cycle?    a. it only includes pressure changes that occur during one heart beat  b. it refers to volume changes that occur in one heart beat  c. it includes mechanical events during one complete heart beat  d. it refers to electrical activity of the heart during one complete heart beat

What is the correct order of events in the left ventricle during the systole phase of the cardiac cycle?   a. Ventricular repolarization, ventricular relaxation, 2nd heart sound, AV valve opens, blood moves in b. QRS-complex, ventricular contraction, 2nd heart sound, aortic valve opens, blood moves out c. P-wave, increased ventricular pressure, 1st heart sound, aortic valve opens, blood moves in d. QRS complex, ventricular contraction, 1st heart sound, AV valve opens, blood moves out e. QRS complex, increased ventricular pressure, AV-valve closes, blood moves out

Which of the following is NOT a difference in blood between males and females? A.Males have a larger volume of blood than females B.Males have a higher hemocrit percentage of plasma than females C. males have more erythrocytes than females D. All of the above are true

If somebody was doping on EPO and you analyzed a sample of their blood you would likely find: A. higher than normal percentage of plasma B. A higher than normal percentage of circulating reticulocytes C. lower than normal amount of blood viscosity. D. increased chance of anemia

The loss of arterial elasticity with age in particular affects... a. Max heart rate b. End diastolic volume c. Systolic pressure d. Stroke volume e. Diastolic pressure