Question 1 (5 points)
The function of the respiratory system is to deliver oxygen to body tissues and remove carbon dioxide from the tissues. Answer the following questions about respiration:
a. Why does the body require oxygen, and why does it produce carbon dioxide as a waste product?
b. Which way do oxygen and carbon dioxide flow during gas exchange in the lungs, and why?
c. Which way do oxygen and carbon dioxide flow during gas exchange between the blood and the body’s cells, and why?
Question 2 (5 points)
Alex goes to the doctor and learns that his blood pressure is 135/90 mm Hg. Answer the following questions about his blood pressure:
a. Is this a normal blood pressure? Why or why not?
b. Which number refers to the systolic pressure? Which number refers to the diastolic pressure?
c. Describe what the atria and ventricles of Alex’s heart are doing when the pressure is at 135 mm Hg. Describe what the atria and ventricles are doing when the pressure is at 90 mm Hg.
d. Alex’s doctor would like him to lower his blood pressure. Why do you think he would like Alex to do this, and what are some ways in which he may be able to lower his blood pressure?
Question 3 (5 points)
High blood pressure can both contribute to the development of kidney disorders and be a symptom of kidney disorders. What is a kidney disorder that can be caused by high blood pressure? What is a kidney disorder that has high blood pressure as a symptom? How does blood pressure generally relate to the function of the kidney?
Question 4 (5 points)
What is urea? Where is urea produced, and what is it produced from? How is urea excreted from the body?
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