3. carbon dioxide (co₂) concentration is not represented on the graph. based on the introduction of this…

3. carbon dioxide (co₂) concentration is not represented on the graph. based on the introduction of this activity, predict the relationship between exercise and the concentration of co₂ in venous blood. as the intensity of exercise increases, the concentration of carbon dioxide in venous blood ____________. i know this because... assessment questions 1. which statement best describes what happens during gas exchange in humans? 1 a. oxygen diffuses from the blood into the alveoli, while carbon dioxide diffuses into the blood. b. oxygen diffuses from the alveoli into the blood, while carbon dioxide diffuses from the blood into the alveoli. c. both oxygen and carbon dioxide diffuse from the blood into the alveoli. d. both oxygen and carbon dioxide diffuse from the alveoli into the blood. 2. during exercise, oxygen levels in venous blood decrease because— 1 a. muscles use more oxygen to produce energy through cellular respiration b. arteries stop carrying oxygen to the muscles c. carbon dioxide prevents oxygen from binding to hemoglobin in the lungs d. the heart pumps blood too quickly for gas exchange to occur 3. evaluate the claim that breathing rate increases during exercise to help the body maintain homeostasis 1

3. carbon dioxide (co₂) concentration is not represented on the graph. based on the introduction of this activity, predict the relationship between exercise and the concentration of co₂ in venous blood. as the intensity of exercise increases, the concentration of carbon dioxide in venous blood ____________. i know this because... assessment questions 1. which statement best describes what happens during gas exchange in humans? 1 a. oxygen diffuses from the blood into the alveoli, while carbon dioxide diffuses into the blood. b. oxygen diffuses from the alveoli into the blood, while carbon dioxide diffuses from the blood into the alveoli. c. both oxygen and carbon dioxide diffuse from the blood into the alveoli. d. both oxygen and carbon dioxide diffuse from the alveoli into the blood. 2. during exercise, oxygen levels in venous blood decrease because— 1 a. muscles use more oxygen to produce energy through cellular respiration b. arteries stop carrying oxygen to the muscles c. carbon dioxide prevents oxygen from binding to hemoglobin in the lungs d. the heart pumps blood too quickly for gas exchange to occur 3. evaluate the claim that breathing rate increases during exercise to help the body maintain homeostasis 1

Answer

Brief Explanations:

  1. During gas - exchange in humans, oxygen diffuses from the alveoli (where it is high in concentration) into the blood (where it is low in concentration), and carbon dioxide diffuses from the blood (where it is high in concentration) into the alveoli (where it is low in concentration).
  2. During exercise, muscles require more energy, and they use more oxygen through cellular respiration, which leads to a decrease in oxygen levels in venous blood.
  3. During exercise, the body's cells need more oxygen and need to get rid of more carbon dioxide. Increasing the breathing rate helps to take in more oxygen and expel more carbon dioxide, thus maintaining homeostasis.

Answer:

  1. b. Oxygen diffuses from the alveoli into the blood, while carbon dioxide diffuses from the blood into the alveoli.
  2. a. muscles use more oxygen to produce energy through cellular respiration
  3. The claim is valid. During exercise, cells have a higher demand for oxygen and need to eliminate more carbon - dioxide. An increased breathing rate allows for more oxygen intake and more carbon - dioxide expulsion, helping the body maintain homeostasis.