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BIO 169 Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
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BIO 169 Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
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BIO 169 Exam 1 | Questions And Answers Latest {2024- 2025} A+ Graded |100% Verified
Which of the following are important sources of resistance to blood flow? - All of the Above
A _________ allows an organ to recieve blood from more then one arterial source or drain blood into
more then one vein. - vascular anastomoses
Arteries can be best defined as - vessels that carry blood away from the heart.
A decrease in hematocrit will result in a decrease in ____________ resulting in a decrease in blood
pressure. - blood viscosity
The systolic pressure - all of the above
Unlike most organs when an area of the lungs has a low oxygen content, perhaps because of disease or
damage to the tissue, the blood vessels in that area - undergo vasoconstriction so less blood will reach
those tissues.
Vasodilation - is an increase in the diameter of a blood vessel.
Which of the following is a correct statement concerning continuous capillaries? - constitute the blood-
brain barrier
What is the relationship between the velocity blood flows through vessels and the cross-sectional area
of the vessels? - The higher the cross sectional area the slower the blood flows, like in capillaries.
Which blood vessel is made of only one tissue layer, the tunica interna? - capillaries
Which of the following can result if renin is released by the kidneys? - All of the above resulting in a raise
in blood pressure
, Which of the following is a true statement concerning the impact of alcohol on the body? - Alcohol
inhibits ADH release causing vasodilation resulting in a flushed appearance
Which of the following factors would not increase resistance? - An increase in the diameter of the blood
vessel.
Which of the following hormones is produced by the heart and causes blood pressure to decline? - atrial
natriuretic peptide
Which of the following is a correct statement concerning blood flow to the capillaries? - precapillary
sphincters are composed of smooth muscle, relaxation of this sphincter allows blood to enter the
capillary bed
Which of the cardiovascular system's circuits has deoxygenated blood in its arteries? - pulmonary circuit
Increased cardiac output will cause an _______________ in blood pressure. - Increase
Which of the following is responsible for moving blood in the veins? - all of the above
Which of the following structures is responsible for changing the flow of blood through a capillary bed
based on the needs of the tissue? - precapillary sphincters
Which type of artery contains relatively more smooth muscle? - muscular (distributing) arteries
Which type of artery would be found closest to the heart and have large lumens to reduce the
resistance encountered by blood leaving the heart? - Elastic (conducting) arteries
Which type of capillary would be found in the kidney where large amounts of filtration must occur? -
fenestrated capilaries
Which type of circulatory shock results from a large loss of blood? - hypovolemic shock
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