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dfc4dde4fe409@placeholder.24190.edu. Printing is for personal, private use only. No part of this book may s prior permission. Violators will be prosecuted. 7 Terabe. Mark the following statements as true mor fa be ? a true staternent the statement is false, correct it to make it a The three major dircuits of blood fiow in the body are the systemic, cerebral, and pulmonary circuits. b. The external carotid arteries and vertebral arteries supply blood to the brain c Blood is drained from the brain by a set of dural sinuses d Venous blood from the spleen, digestive tract, and pancreas drains into the inferior vena cava pu/monary circuits 8 What is the purpose of the hepatic portal system? 9 The middle layer of the blood vessel wall is the a. tunica interna; smooth muscle b. tunica externa; endothelium c tunica media, endothelium d tunica interna; endothelium and contains e tunica meda, smooth muscle 10 Which of the following is not a common pulse point? a. Subclavian artery b. Femoral artery c. Brachial arcery. d. Dorsalis pedis arteryExplanation / Answer
7. a. The three major circuits of blood flow in the body are the systemic, cerebral and pulmonary circuits: FALSE
Explanation: The three major circuits of blood flow in the body are Coronary circuit, Pulmonary circuit and systemic circuit. In the given statement it was given as Cerebral circuit which is not the major circuit as mentioned above. Hence, the given statement is false
b. The external carotid arteries and vertebral arteries supply blood to the brain: FALSE
Explanation: Internal carotid arteries (to anterior brain) and vertebral arteries (to posterior brain and brainstem) supply blood to the brain. Since external carotid arteries was mentioned in the statement instead of internal, the given statement is FALSE
c. Blood is drained from the brain by a set of dural sinuses: TRUE
Blood from the brain does not drain into one vein but drains into spaces which are present in between the two layers of dura matter called as DURAL SINUSES. Hence, the given statement is true.
d. Venous blood from the spleen, digestive tract, and pancreas drains into the inferior venacava:
Explanation: The venous blood from the spleen, pancreas, gall bladder and abdominal digestive tract first drains into the Hepatic portal vein which then ultimately enters into inferior venacava. Hence, the given statement is false
8. What is the purpose of the hepatic portal system?
Answer: Hepatic portal system gets the deoxygenated blood which is rich in nutrients from the abdominal digestive tract. Hepatic portal system filters this blood due to the presence of capillary beds on either side of the system and drain it to liver which processes the nutrients (since liver is the major organ for metabolism of nutrients) which are absorbed in the digestive tract before the deoxygenated blood reaches the heart through inferior venacava.
9. The middle layer of the blood vessel wall is the _tunica media_ and contains __smooth muscle_
Answer: Option e. tunica media and smooth muscle
Explanation: Blood vessels are made up of three layers. Inner layer calledTunica intima which is simple squamous epithelium, and consists of subendothelial connective tissues, internal elastic lamina, middle layer called Tunica media which consists of external elastic lamina, vascular smooth muscles, and Outer layer called Tunica adventitia which is also made of connective tissue and nutrient capillaries
Hence, the answer is option e. which fits the description for middle layer
10. Which of the following is not a common pulse point?
Answer: Option A: Subclavian artery
Explanation: Subclavian artery is a pressure point but not a common pulse point. While Dorsalis pedis artery is a pulse point, femoral and brachial arteries are used as both pulse and pressure points
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