Arteries and Veins carry oxygenated blood and deoxygenated blood. Do arteries an

Question

Arteries and Veins carry oxygenated blood and deoxygenated blood. Do arteries and veins have oxygen needs? If so, how are they met? a) Only Arteries get their oxygen from the blood they carry. b) Only Veins get their oxygen from the blood they carry. c) Both Veins and Arteries get their oxygen from the blood they carry. d) There are separate vessels that oxygenate Veins and Arteries. e) Veins and Arteries do not require oxygen. Choroid plexuses are specialized capillaries in the CNS that: 1. are covered by ependymal cells. 2. are located in the walls of the ventricles. 3. are located in the dual venous sinuses. 4. are the sites for reabsorption of CSF 5. are derived from the arachnoid layer of the meaninges. a) 3, 4, 5 b) 1, 2, 4, 5 c) 1, 2 d) 2, 3, 4

Explanation / Answer

1) c) Both Veins and Ateries get their oxygen from the blood they carry

Both Veins and Arteries are living cells and require oxygen for the formation of energy. They fulfull this requirement from the blood they carry. Veins are capable to fulfull their oxygen requirement even from the deoxygeneted blood.

2) b) 1, 2, 4, 5

Choroid plexuses are not located in the dural venous sinuses. These are covered by ependymal cells and lines the ventricles. The choroid plexus consists of many capillaries, separated from the ventricles by choroid epithelial cells. Epithelial cells of the choroid plexus is at the peripheral blood–CSF boundary and the arachnoid membrane at the cerebral blood–CSF boundary.

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