Which of the following veins drain into the hepatic portal vein? (Circle all tha
ID: 3481572 • Letter: W
Question
Which of the following veins drain into the hepatic portal vein? (Circle all that apply) a. Renal vein b. Splenic vein C. Superior mesenteric vein d. Inferior mesenteric vein e. Hepatic veins f. Gastric veins Which of the following describes the purpose of the hepatic portal system? a. It provides the liver with oxygenated blood b. It allows the liver to process and detoxify nutrient-ich blood from most of the abdominal organs. 8 c. It drains blood from the liver to the inferior vena cava. d. All of the above. 9 From superficial to deep, the layers of the blood vessel wall include the: 10 Which of the following correctly describes the role of the smooth muscle cells in the blood vessel wall? a. They play an important role in determining the amount of blood flowing to a tissue (tisue perfusion). b. They play an important role in determining blood pressure. c. They control the diameter of the blood vessel. d. All of the above. e. None of the above.Explanation / Answer
7. Hepatic portal vein carries blood from spleen and gastrointestinal tract to liver. Superior mesenteric vein, splenic vein, inferior mesenteric vein and gastric vein drain into portal vein.
8. All of the above. Hepatic portal sytem performs all the functions mentioned.
9. Blood vessels, all arteries and veins are made up of endothelial cells, smooth muscle cells and extracellular matter (collagen & elastin) arranged in 3 concentric layers.
a. Tunica adventitia: outermost layer composed of connective tissue, nutrient vessels and autonomic nerves.
b. Tunica media: muscular middle layer
c. Tunica intima: innermost layer composed of endothelial cells.
10. d. All of the above
Smooth muscles contract or relax and can change tone or size of vessel and hence the amount of blood flowing. It also affects BP, too much vasoconstriction causes high BP and too much vasodilatation causes low BP.
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