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These capillaries allow proteins to enter the blood vessels and are found in red bone marrow. sinusoid (discontinuous) continuous fenestrated evans capillaries This is secreted by juxtaglomerular cells in the kidneys in response to decreased blood volume. angiotensin 11 atrial natriuretic peptide renin aldosterone The movement of a substance from an area of high concentration to low concentration is osmosis perfusion flow diffusion Veins are called capacitance vessels because a they stretch to fill with blood and the blood pressure increases an equal amount Ob.they stretch to fill with blood without an increase in blood pressure O c. they rebound after filling with blood and the blood pressure drops quickly d. contraction of the smooth muscle cells in the walls pushes blood forward toward the heart When we take our pulse in our neck or on our wrist, we are feeling the pulsatile flow in a capillaries b.veins c. arterioles d. elastic arteries
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