Physiology A healthy 28-year old woman stands up from a supine position. Which of the following cardiovascular changes is MOST likely to occur? A Decreased myocardial contractility B Decreased total peripheral resistance C Dilation of large veins D Increased hea rate 💡 Explanation A healthy 28-year old woman stands up from a supine position. Which of the following cardiovascular changes is MOST likely to occur? ✓ Correct Answer: D. Increased hea rate