Blood

Practice: It’s a beautiful, warm, sunny, and very humid day in Miami. To take advantage of this exquisite weather, a 24-year-old female goes for a 10K (6.2 mile) run. As a result, she sweats—a lot! Sweat volume is lost from the blood plasma. Which of the following describes the effect of this profuse sweating on the runner’s hematocrit?

Practice: A 35-year-old male has been having a flare of his Crohn Disease for the last two weeks. As a result, he has been bleeding into his digestive tract—there has been a steady, moderate amount of blood in each of his bowel movements. He drinks plenty of water. Which of the following describes the effect of this steady gastrointestinal bleeding on his hematocrit?