Part A As part of a bood dive on campus for the American Red Gross, you and your fiends have fust donated 500 ml of blood. You are now relaxing at the student lounge, waiting fo though you are thisty you haven't bothered to buy yourself a dhink. Other than a litte soreness of the skin and tissue around your median cubital vein, you feel line. How has yo most likely alfected your cardiac output, heart rate and stroke volume? Viow Available Hint(s) no change in cardiac output, increaded heart rate, decreased stroke volume no change in cardiac output, decreased heart rate, increased stroke volume decrease in cardiac output, decreased heart rate, decreased stroke volume increase in cardiac output, increased heart rate, itrereased stroke volume Submit

When you donate 500 ml of blood, several physiological responses occur to maintain homeostasis: 1. **Blood Volume Reduction**: Donating 500 ml of blood reduces your total blood volume by about 10%. 2. **Heart Rate Increases**: To compensate for the reduced blood volume and maintain adequate tissue perfusion, your heart rate increases. 3. **Stroke Volume Decreases**: With less blood returning to the heart (preload), the amount of blood pumped out with each beat (stroke volume) decreases. 4. **Cardiac Output Remains Stable**: The increase in heart rate generally compensates for the decrease in stroke volume, resulting in no significant change in overall cardiac output. **Therefore, the most likely effect is:** **No change in cardiac output, increased heart rate, decreased stroke volume.** **Answer:** No change in cardiac output, increased heart rate, decreased stroke volume