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.

In the Wiggers diagram,  

In the excitation-contraction coupling in cardiac muscle,

Comparing the action potentials of a cardiac contractile cell and a pacemaker cell, choose the correct statement.

In order for high force crossbridges to form in contracting skeletal muscle, calcium must

IV. Le verbe avoir Conjugate the verb avoir in the following sentences. Make the sentence positive or negative depending on the situation that applies to you. Be sure to include the necessary article. Follow the modèle below. Modèle : Tu / une télé dans ton salon →  Tu as une télé dans ton salon OR Tu n’as pas de télé dans ton salon.