Week 3 - Blood Vessels Flashcards
Which layer of the arterial wall is responsible for vasoconstriction?
a. tunica interna b. tunica externa c. tunica media
c. tunica media
Which of the following blood vessels carries blood from the tissues back to the heart?
a. aorta
b. arterioles c. veins d. arteries
c. veins
In resting individuals, these vessels serve as a large blood reservoir from which blood can be quickly diverted to other vessels as needed.
a. Venules and capillaries b. Arteries and arterioles c. Arterioles and capillaries d. Veins and venules
d. Veins and venules
At rest more blood is in the venous system
Which of the following structures are found in veins but NOT in arteries?
a. tunica externa b. lumen c. tunica media d. valve
d. valve
Elastic arteries function as:
a. conduits to the tissues of the trunk only. b. vasodilators. c. pressure reservoirs. d. vasoconstrictors. e. barriers to microcirculation.
c. pressure reservoirs.
The largest driving force for pulling fluid from the interstitial spaces back into the capillaries is
a. interstitial fluid osmotic pressure.(IFOP) b. blood colloid osmotic pressure.(BCOP) c. blood hydrostatic pressure. (BHP) d. glomerular hydrostatic pressure. e. interstitial fluid hydrostatic pressure (IFHP)
b. blood colloid osmotic pressure.(BCOP)
Revise the textbook section on capillary exchange.
The pressure-driven movement of fluids and solutes from blood into interstitial fluid is called
a. filtration. b. reabsorption. c. bulk flow. d. osmosis.
a. filtration.
Which of the following is the most important method of capillary exchange? Choose one answer. a. bulk flow b. diffusion c. transcytosis
b. diffusion
Revise capillary exchange in your textbook.
Pressure against the walls of capillaries due to water in the blood is called
a. interstitial fluid hydrostatic pressure b. blood osmotic pressure c. blood hydrostatic pressure
c. blood hydrostatic pressure
Revise the section on Bulk flow in your textbook.
Which of the following would NOT result in an increase in systemic vascular resistance?
a. Decreased diameter of systemic arterioles b. Increased blood viscosity c. Increased vasoconstriction of systemic arterioles d. Increased red blood cell count e. Decreased length of the systemic circulatory route
e. Decreased length of the systemic circulatory route
Please revise the section on vascular resistance in your textbook.
2) Which of the following characteristics of blood depends mostly on the ratio of RBCs to plasma volume?
a. blood viscosity b. clotting time c. total blood volume d. venous return
a. blood viscosity
If blood pressure drops, a negative feedback mechanism causes
a. increase in heart rate, stroke volume, and vasoconstriction b. vasodilation to allow more blood to return to the heart c. increase in capillary blood flow to insure that the cells get oxygen
a. increase in heart rate, stroke volume, and vasoconstriction
Which of the following would NOT result in an increase in arterial blood pressure?
a. Increased heart rate b. Increased sympathetic stimulation c. Increased stroke volume d. Increased blood volume e. Increased arteriolar vasodilation
e. Increased arteriolar vasodilation
Which of the following would be a normal response of the cardiovascular system to a decreased frequency of action potentials arising from the baroreceptors?
a. Decreased heart rate b. Decreased stroke volume c. Increased parasympathetic stimulation d. Increased systemic vascular resistance e. Decreased cardiac output
d. Increased systemic vascular resistance
Please revise 21.4 Describe how blood pressure is regulated & 21.4 Control of Blood Pressure and Blood Flow in your textbook.
