Unit #8: The circulatory System- Blood Vessels and Circulation – Flashcards
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Large veins, medium veins, and venules have valves to prevent the backflow of blood.
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False
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Vasoreflexes can raise or lower blood pressure throughout the body.
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True
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Most tissue fluid is reabsorbed by the lymphatic system.
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False
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Lung tissue receives nourishment and waste removal from the pulmonary circuit.
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False
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The three primary branches of the celiac trunk are the common hepatic, left gastric, and splenic veins.
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False
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Arteries are sometimes called the __________ vessels of the cardiovascular system because they have strong-resilient tissue structure.
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Resistance
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Which vessels have the thickest tunica media?
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Large arteries
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Where is the greatest volume of blood found in the body?
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Veins
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Alternative routes of blood supply are called __________.
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Anastomoses
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Which of the following is not a possible circulatory route from the heart?
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Heart ? arteries ? capillary bed ? vein ? capillary bed ? arteries ? heart
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In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. What causes the varicose veins?
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Failure of the venous valves
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What is the mean arterial pressure for a person with 110 and 65 mm Hg as systolic and diastolic pressure, respectively?
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80 mm Hg
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Which of the following would decrease the velocity of blood flow?
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Increased viscosity
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Which of the following decreases blood pressure?
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Atrial natriuretic peptide
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Which of the following are powerful vasoconstrictors?
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Norepinephrine an angiotensin II
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Which of the following would decrease capillary filtration?
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Dehydration
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A mean arterial pressure below 60 mmHg can cause which of the following?
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Syncope
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What type of shock can be produced by hemorrhage, severe burns, or dehydration?
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Hypovelmic
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Blood flow to the __________ remains quite stable even when mean arterial pressure (MAP) fluctuates from 60 to 140 mm Hg.
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Hypothalamus
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The lungs receive a systemic blood supply by way of which vessel(s)?
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Bronchial arteries
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Which of the following is absent in humans?
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Right and left brachiocephalic arteries
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Which vessel supplies 80% of the cerebrum?
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Internal carotid artery
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Which of the following best describes the cerebral arterial circle (circle of Willis)?
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An anastomosis surrounding the pituitary gland
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What are the major branches of the abdominal aorta from superior to inferior?
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Celiac trunk, superior mesenteric artery, renal arteries, gonadal arteries, inferior mesenteric artery, and common iliac arteries
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Which of the following constitutes the principal venous drainage of the thoracic organs?
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The azygos system
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What are the afferent vessels that carry blood back to the heart?
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Veins
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Which of the following is a portal system?
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Heart ? artery ? arteriole ? capillary bed ? arteriole ? capillary bed ? venule ? vein ? heart
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Your grandmother is experiencing temporary dizziness, blurred vision, paralysis on her left side, and mild aphasia. What do you think might be happening?
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She is having a TIA
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Which of the following activities would fatigue your hand muscles the fastest?
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Squeezing a ball as hard as you can without stopping
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What is the path of blood flow from the heart to the lung tissues and back to the heart?
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Left ventricle ? aorta ? bronchial arteries ? lung tissues ? bronchial veins ? azygos vein ? superior vena cava ? right atrium
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What is the path of blood from the heart to the right little finger (pinky) and back to the heart?
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Aorta ? brachiocephalic trunk ? right subclavian artery ? right axillary artery ? right brachial artery ? right ulnar artery ? palmar arches ? venous palmar arches ? right ulnar vein ? right brachial vein ? right axillary vein ? right subclavian vein ? right brachiocephalic vein ? superior vena cava
