Bios 255 Midterm_Finals Exam

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Bios 255 Midterm_Finals Exam

• Which of the typical blood vessels has a thin tunica tunica media dominated by collagen

fibers?–Answer veins

• Capillaries surrounding the choroid plexus is of which type?

–Answer Fenestrated capillaries

• Blood flow through a capillary bed is passed by what structure?

–Answer Atriovenous Anastomosis

• Blood flows toward the heart in the veins by?

–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?

–Answer Resis- tance

• Blood volume is decreased by what two hormones?

–Answer ANP & BNP

• Which of the following is not a vasoconstrictor?

-Prostagladin -Thromboxones -Nitric Oxide –Answer Nitric Oxide 1 / 2

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• Vasodilation is achieved by adrenergic receptors. True or False

–Answer False

• Baroreceptors are found in what sinus?

–Answer Carotid Sinuses

• Which of the typical blood vessels has thick tunica media dominated by smooth muscle

cells and elastic fibers?–Answer Arteries

• Femoral artery is a type of what artery?

–Answer Muscular Artery

• Capillaries that have a complete lining are called what?

–Answer Continuous Capil- laries

• Blood flow through a capillary is regulated by what?

–Answer Precapillary Sphincter

• As the blood flows from the aorta towards the cappilaries what increases?-

–Answer Resistance

• Pressure gradient of water causes osmosis. True or False

–Answer False

• Which of the following is NOT a vasodilator?

–Answer Prostagladin

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