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BIO 169 Exam 1 (Answered) 99 Questions and Correct Answers, 100% Correct. Updated 2024/2025.
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BIO 169 Exam 1 (Answered) 99 Questions and Correct Answers, 100% Correct. Updated 2024/2025.
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BIO 169 Exam 1 (Answered) 99Questions and Correct Answers, 100%
Correct. Updated 2024/2025.
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
Which type of vessel has the highest total cross sectional area?
Capillaries
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