DBQ: Blood Supply to the Kidney (p.244)
1)The rate of the blood flow to the kidney is the highest compared to the other organs such as heart muscles, skeletal muscle, skin, and brain. With the fastest rate of 420.0ml min-1 100g-1 to the kidney, it is approximately 5 times the rate of blood flow to the heart muscle.
2) The blood flow rate of a kidney is 420.0 ml min-1 100g-1 & 1 liter is 2.38 min-1 100g-1.Thus, 84.0 × 2.38 = 200 ml volume oxygen.
3) Skin = 0.38/2.6 = 15%
Skeletal muscle (resting) = 0.18/0.5 = 36%
Heart muscle =11.0/17.4 = 13%
Kidney = 6.80/84.0 = 8%
4) The difference between the kidney and the other organs is in the volume of blood flowing to the organ, and the percentage of oxygen in the blood that is consumed is because all organs function differently and consume different amounts of energy, thus oxygen. For example, the kidney functions to remove all wastes from the blood thus the greatest volume of blood flows to the organ since all the blood flows into the kidney. Yet again, the skeletal muscle needs oxygen when a body is active and requires a different rate of blood flow and oxygen delivery as the kidney.
5) Active transport of substances (e.g. Na+), requires energy.
6) If the person were moved to a cold environment, vasoconstriction would occur causing a reduction in the blood flow to preserve the core temperature. Thus, the blood flow will slow down as a result.