Systemic Circulation Quiz 2

When physical exertion has ended and the body is at rest, veins demonstrate

a. Vasodilation so that they function as blood reservoirs

b. Vasodilation so that blood is shifted toward the rest of the circulatory system

c. Vasoconstrictors that they function as blood reservoirs

d. Vasoconstrictors that blood is shifted toward the rest of the circulatory system

a. Vasodilation so that they function as blood reservoirs

Blood colloid osmotic pressure is largely due to

a. The proteins in the blood and it promotes reabsorption

b. The high amount of water in the blood, and it promotes diffusion out of the capillaries

c. The proteins in the blood and it promotes filtration

d. The pressure generated by the heart, and it favors osmosis into the arteriole end of the capillary bed

e. The high amount of water in the blood, and it promotes filtration from arterioles

a. The proteins in the blood and it promotes reabsorption

Net filtration pressure (NFP) is equal to the

a. Blood hydrostatic pressure minus the tissue hydrostatic pressure

b. Colloid osmotic pressure in the blood divided by resistance in the tissue

c. Blood pressure times the total peripheral resistance

d. Net hydrostatic pressure minus the net colloid osmotic pressure

e. Osmotic pressure in the tissue minus the hydrostatic pressure in the blood

d. Net hydrostatic pressure minus the net colloid osmotic pressure

As blood moves from the arterial end to the venous end of a capillary, net filtration pressure

a. Increases, as blood hydrostatic pressure rises

b. Increases, as blood colloid osmotic pressure rises

c. Decreases, as blood hydrostatic pressure decreases

d. Decreases, as blood colloid osmotic pressure decreases

e. Remains the same, as rises in blood osmotic pressure are offset by declines in tissue osmotic pressure

c. Decreases, as blood hydrostatic pressure decreases

Angiogenesis

a. is a momentary chemical control of local blood flow

b. involves muscular contraction of arterioles to alter local perfusion

c. allows for an increase in the perfusion of a local tissue

d. involves building new muscle tissue and decreasing the amount of blood vessels in a region

c. allows for an increase in the perfusion of a local tissue

Imagine yourself sitting in an awkward position in an uncomfortable chair that is depriving part of your leg from normal blood flow. This deprivation of adequate perfusion will result in what sort of local changes in your leg?

a. decreases in CO2 and H+ will cause vasodilation

b. buildup of CO2 and H+ will cause vasoconstriction

c. buildup of CO2 and H+ will cause vasodilation

d. decreases in O2 and K+ will cause vasoconstriction

e. increases in O2 and K+ will cause vasodilation

c. buildup of CO2 and H+ will cause vasodilation

Tissue damage can trigger local release of histamine, which can

a. stimulate release of nitric oxide, a vasodilator

b. stimulate release of nitric oxide, a vasoconstrictor

c. inhibit release of nitric oxide, a vasodilator

d. inhibit release of nitric oxide, a vasoconstrictor

a. stimulate release of nitric oxide, a vasodilator

To prevent excessive blood loss following tissue damage, local chemicals such as

a. bradykinins are released to trigger vasoconstriction

b. nitric oxides are released to trigger vasoconstriction

c. thromboxanes are released to trigger vasoconstriction

d. prostaglandins are released to trigger vasodilation

c. thromboxanes are released to trigger vasoconstriction

Systolic blood pressure is recorded

a. In arteries and is the minimum pressure that is recorded during ventricular contraction

b. In arteries and is the maximal pressure that is recorded during ventricular contraction

c. In veins and is the maximal pressure that is recorded during atrial contraction

d. In veins and is the minimum pressure that is recorded during atrial contraction

e. In both arteries and veins and is the maximum pressure recorded during diastole of the heart

b. In arteries and is the maximal pressure that is recorded during ventricular contraction

If someone’s blood pressure were listed as 125/75 mm Hg, then their pulse pressure would be

a. 125 mm Hg

b. 5/3

c. 50 mm Hg

d. 40 mm Hg

e. 100 mm Hg

c. 50 mm Hg

If someone’s blood pressure were listed as 110/65 mm Hg, then their mean arterial pressure (MAP) would be

a. 70 mm Hg

b. 80 mm Hg

c. 90 mm Hg

d. 100 mm Hg

e. 110 mm Hg

b. 80 mm Hg

Peripheral resistance is

a. Directly related to both vessel length and radius

b. Inversely related to both vessel length and radius

c. Directly related to vessel length and inversely related to vessel radius

d. Inversely related to vessel length and directly related to vessel radius

c. Directly related to vessel length and inversely related to vessel radius

Cardiac center of the brainstem includes the

a. Cadioacceleratory center, from which parasympathetic pathways extend

b. Cadioacceleratory center, from which sympathetic pathways extend

c. Vasomotor center, from which parasympathetic pathways extend

d. Cadioinhibitory center, from which sympathetic pathways extend

e. All of the choices are correct

b. Cadioacceleratory center, from which sympathetic pathways extend

Excitation of the vasomotor center results in

a. Increased sympathetic activity and predominantly more vasoconstriction than vasodilation

b. Increased parasympathetic activity and predominantly more vasodilation than vasoconstriction

c. Increased autonomic activity that increases heart rate and dilates blood vessels

d. Increased autonomic activity that decreases heart rate and constricts blood vessels

e. Redistribution of blood flow away from the skeletal muscles and toward the skin

a. Increased sympathetic activity and predominantly more vasoconstriction that vasodilation

High carbon dioxide levels and low pH in blood of the carotid arteries will stimulate

a. Baroreceptors to activate the vasomotor center

b. Chemoreceptors to activate the vasomotor center

c. Baroreceptors activates the Cardioinhibitory center & inhibit the Cardioacceleratory center

d. Chemoreceptors to inhibit the vasomotor center

e. Baroreceptors and chemoreceptors to activate the Cardioinhibitory center and inhibit the vasomotor center

b. Chemoreceptors to activate the vasomotor center