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What molecule is considered the energy currently of the cell; it donates its energy by breaking one of its bonds?

This figure shows the O2 content (mL O2/100 mL blood) and % Hb-O2 saturation under normal, carbon monoxide and severe anemic conditions.   A. For resting systemic tissue, what is the Hb-O2 saturation for someone who is anemic and someone who has carbon monoxide poisoning?   B. Under normal conditions, if the partial pressure is 40 mm Hg, what is the best estimate of the amount of O2 (ml O2/100 mL) that is released from blood as it circulates through systemic tissues?   

A drug is administered that blocks the potassium-channels embedded in the sarcolemma of cardiac muscle cells (i.e., diminishes the ability for K+ to flow across the membrane). How will this affect the length of the refractory period? Explain your reasoning. [Answer in 2-3 sentences]

Of the choices provided, what is the  2nd  step to stimulate the quadriceps (large skeletal muscle of the thigh)?

What is the state of the heart by the end of early ventricular systole? 

Of the choices provided, what is the 4th step to stimulate the quadriceps (large skeletal muscle of the thigh)?

What is the net filtration pressure at the venule end of the capillary?   Pressures (mmHg) Arterial End of Capillary Venule End of Capillary Hydrostatic pressure in the capillary 30 15 Osmotic pressure in the capillary 26 26 Hydrostatic pressure in the interstitial space 0 0 Osmotic pressure in the interstitial space 6 6 PO2 100 42 PCO2 40 46

What is the state of the heart during late ventricular systole?

Archie  wanted to improve his performance in a marathon. 6 weeks before a race 500 mL of blood was removed from his body, and the formed elements were separated from the plasma. The formed elements were frozen, but the plasma was reinfused into his body.  Later the formed elements were thawed and injected back into his body. Would the re-injection of the formed elements affect the flow (F) of his blood? Explain your reasoning.

Of the choices provided, what is the  5th  step to stimulate the quadriceps (large skeletal muscle of the thigh)?