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. Much of the fluid that moves across capillary walls and into the tissues moves

ID: 67235 • Letter: #

Question

. Much of the fluid that moves across capillary walls and into the tissues moves as a on the other hand travels from the result of fitration, forced by blood pressure. O capillaries into the tissues C because of a concentration gradient between O, in the tissues and O, in the blood because it is pumped into the tissues where it is ncoded C because esmotic pressure causes a net flow of O, from the tissues into the blood because of high CO concentration in the tissucs, created as a by-prodact of celllar The diagram above is a lever system. The purple box is the load; the red circle is a hinge joint. The dotted and dashed ines are artficial muscles, or actuators. The solid hinge joint. The dotted and dashed ines are antlicial musdles, or actuators. The solid at a certain speed. You want it to move in at a faster speed. 2 2. Moving the attachment point oftheflexor on skeletal element #1 towards the jort will increase the speed of the load true false Bisphosphoglycerie acild (BPG) is a byproduct of glycolysis released into the 3. bloodstreamm when an animal's supply of oxygen is low. Like protons, it decreases hemoglobin's affinity for O. The effect of high BPG levels would be that: hemoglobin picks up more O in the lungs than it would without BPG hemoglobin holds on so more of its O, than it would without BPG hemoglobin loses its cooperative binding of oxygen hemoblobin releases more of its bound O, dan it would without the BPB r hemoglobin now binds more oxypen at low partial pressures than a high partial pressures 4. In systemic tissue fluids, the enzyme carbonic anhydrase catalyzes the reaction CO HO H.CO (which then can dissociate into H and HCO). In fact, CO released from converted to CO +H.O in the pulmonary capillaries by the same enzyme, and there the The direction of a reversible reaction is influenced by the concentrations of scactants n the bloodstream. HCO. is cells is converted to HCO ions a CO, is exhaled. How is it possible for the same enzyme to catalyze reverse reactions? and products ln pulmonary cinculation, the low CO, concentration favors the formation of COand HO The lungs coetain an allosteric inhibitor that prevents the formation of carbenic acid

Explanation / Answer

1. a. Because of a concentration gradient between oxygen in the tissues and oxygen in the blood.

The pressure gradient existing between alveoli and capillaries drives the diffusion of oxygen into the capillaries. Again the oxygen moves into the tissues due to the pressure gradient existing between capillaries and tissues. Carbon dioxide also moves in a similar way.