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Bios 255 Final exam with correct answers.
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Bios 255 Final exam with correctanswers
Which of the typical blood vessels has a thin tunica tunica media dominated by collagen fibers? - correct
answer -veins
Capillaries surrounding the choroid plexus is of which type? - correct answer -Fenestrated capillaries
Blood flow through a capillary bed is passed by what structure? - correct answer -Atriovenous
Anastomosis
Blood flows toward the heart in the veins by? - correct answer --With the aid of contractions of the
adjacent skeletal muscles.
-Valves in the veins prevent the backflow of the blood
-Pressure at the venules is higher than the pressure at the venae cava
As the blood flows from venules toward the heart, what increases? - correct answer -Resistance
Blood volume is decreased by what two hormones? - correct answer -ANP & BNP
Which of the following is not a vasoconstrictor?
-Prostagladin
-Thromboxones
-Nitric Oxide - correct answer -Nitric Oxide
Vasodilation is achieved by adrenergic receptors. True or False - correct answer -False
Baroreceptors are found in what sinus? - correct answer -Carotid Sinuses
, Which of the typical blood vessels has thick tunica media dominated by smooth muscle cells and elastic
fibers? - correct answer -Arteries
Femoral artery is a type of what artery? - correct answer -Muscular Artery
Capillaries that have a complete lining are called what? - correct answer -Continuous Capillaries
Blood flow through a capillary is regulated by what? - correct answer -Precapillary Sphincter
As the blood flows from the aorta towards the cappilaries what increases? - correct answer -Resistance
Pressure gradient of water causes osmosis. True or False - correct answer -False
Which of the following is NOT a vasodilator? - correct answer -Prostagladin
Venous reserve is used during extreme blood loss. True or False - correct answer -True
Chemoreceptors are found in what? - correct answer -Aortic Bodies
Venous valves allow blood to flow in BOTH directs. True or False. - correct answer -False
The normal heart sounds are caused by what? - correct answer -The closure of the heart valves
The left ventricular wall of the heart is much thicker than the right wall in order to do what? - correct
answer -Pump blood against a greater pressure
Ventricular depolarization corresponds to what complex? - correct answer -QRS Complex
Blood within the pulmonary veins returns to the heart in what location? - correct answer -Left Atrium
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