Agree or disagree, explain the disagrees.

the heart is composed of atria and ventricles with the atria located on the bottom and ventricles on the top of the heart.

explanation:

as blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta.

explanation:

the pulmonary artery takes blood to the lungs to pick up oxygen.

explanation:

it is not possible to get a heart transplant.

explanation:

when we inhale air, fresh oxygen goes into our blood.

explanation:

blood can travel back and forth through 2-way valves located in the heart.

explanation:

the heart is a double pump with two pumping chambers- the left and right ventricles.

explanation:

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).