Exam 10: The Blood Vessels and Blood Pressure

Endothelin causes arteriolar smooth muscle contraction.

For the following questions, choose the appropriate letter from the answer code below to make the statement true. a.increases b.inhibits or decreases c.has no effect on -Increased venous radii ____ the blood flow through veins.

Indicate which type of vessel performs the function listed by writing the appropriate letter in the blank using the answer code below. a.arteries b.arterioles c.capillaries d.veins e.lymphatics -Serve as low-resistance passageways from the tissues to the heart

Indicate what effect the changes in question would have on blood flow using the following answer code: a.increases blood flow b.decreases blood flow c.no effect on blood flow -Increasing the pressure gradient in a vessel

Indicate what effect the changes in question would have on blood flow using the following answer code: a.increases blood flow b.decreases blood flow c.no effect on blood flow -Increasing the resistance of a vessel

As the concentration of red blood cells increases in the blood, the viscosity of the blood increases.

Active hyperemia refers to

Binding of epinephrine to alpha receptors causes smooth muscle

Given the following parameters, what would the reabsorption pressure be? - Blood pressure at arteriolar end of capillary = 35 mm Hg - Blood pressure at venule end of capillary = 15 mm Hg - Blood osmotic pressure = 22 mm Hg - Interstitial fluid hydrostatic pressure = 1 mm Hg - Interstitial fluid osmotic pressure: 0 mm Hg

A capillary wall has a measured thickness of about one ____________________.

Arteries ensure that blood constantly flows due to contraction of its smooth muscle layer.

Indicate whether arteriolar vasoconstriction or vasodilation would occur in the tissue in question by using the following answer code: a.produces vasoconstriction b.produces vasodilation c.no change in arteriolar caliber -Histamine release in an injured tissue

If the diastolic pressure and systolic pressure were both increased by 10 mm Hg, the pulse pressure would also be increased by 10 mm Hg.

The cardiovascular center responds to rising H⁺/CO₂ by

The extra fluid filtered but not reabsorbed at the capillary level is picked up by the lymphatics.

Irreversible shock occurs when the cardiovascular system itself starts to deteriorate due to side effects from compensatory measures to severe hypotension.

The velocity of blood flow in capillaries is

The osmotic pressure in the blood plasma pushes fluid out of the capillary.

The veins

Cardiovascular changes associated with exercise can be accounted for by local metabolic influences on skeletal muscle arterioles coupled with adjustments via the baroreceptor reflex.