GFR is mainly regulated by

Which of the following statements about renal process is NOT true?

Choose the correct statement about the sodium reabsorption in the kidney.

A force that opposes glomerular filtration is the

Questions 20-21 are multiple multiple choice: Choose all correct, or none if none correct. Regarding the respiratory system, choose the correct statement:

  1.  John is a 55-year-old male with BMI=32. His PO2 is 102 mmHg in the lung and 60mmHg in the tissues during resting. In this situation, what percentage of oxygen was released from hemoglobin to his muscle tissues? (3pts)     2. When John starts to exercise, his PO2 in the tissue drops to 40 mm Hg. Assume his PO2 in his lungs remain the same. In this situation, what percentage of oxygen was released from hemoglobin to his muscle tissues? (3pts)     3. His body temperature and CO2 level both increase due to exercise. What kind of shift will this cause in the HbO2 curve to compensate for the O2 loss? (answer only with the direction, no need to explain why). (2pts.)  

Prolonged high intensity exercise 

Choose the correct timing of the ECG.       

Choose the correct statement about the valves in the heart. 

Choose the correct statement(s) about the preload and afterload.