Answer Happy

Submit your answers to these questions: 1. Why is it incorrect to say that arteries carry oxygenated blood? Hint this is related to the anatomy of the heart and the definition of an artery not so much this story of the athlete, 2. Why is the athlete in this story's heart rate and breathing rate elevated even before the race starts? They are just sitting and waiting after all
Negative feedback loops: A reminder that negative feedback loops follow the pattern: levels change outside of a normal range, sensory receptors detect the change and communicate to the control center, the control center integrates the sensory information, a signal is sent to an effector (muscle or gland) to change how the body function, the levels go back to normal. There are almost two ways that "outside of normal range" can happen the level could be too high or the level could be too low. 3. Describe the negative feedback loop that integrates the heart and the lungs into regulation of oxygen and carbon dioxide. Include both an increase in carbon dioxide AND a decrease in carbon dioxide, Include how the function of the heart and lungs change. Start with "When a person performs exercise, their muscle cells are using more oxygen and producing more carbon dioxide through cellular respiration. As carbon dioxide levels increase in the body. Use terms such as heart rate, stroke volume, breathing rate, breath volume. Bring in the ideas related to diffusion from a few weeks ago and carbonic acid. 4. Describe the negative feedback loop that integrates the heart and blood vessels into short term regulation of blood pressure AND directs blood flow to active organs. What happens when blood pressure goes up and what happens when blood pressure goes down? What happens after a meal to direct blood flow to the digestive system compared to during exercise to direct blood flow to the muscles? Note that the urinary system also plays a role in blood pressure regulation, but on a more long term timeline Start with "When a person performs exercise, their muscle cells are using more oxygen and producing carbon dioxide through cellular respiration. To direct more blood to the skeletal muscles. Use terms such as vasoconstriction and vasodilation, 5. Choose one of these topics. Describe how homeostasis of the cardiovascular system and respiratory system is NOT working in your chosen topic • high blood pressure (hypertension) • right sided heart failure • left sided heart failure emphysema asthma • atherosclerosis .