11) Which blood vessels able to absorb the pressure changes : 1200328

11) Which blood vessels able to absorb the pressure changes : 1200328.


11) Which blood vessels are able to absorb the pressure changes that occur during the cardiac cycle?

A) elastic arteries

B) arterioles

C) muscular arteries

D) arterial anastomoses

E) capillaries

12) Regarding the typical structure of blood vessel walls, those that have only a tunica intima are the

A) arteries.

B) arterioles.

C) veins.

D) venules.

E) capillaries.

13) In a process called autoregulation, ________ in response to a decline in dissolved oxygen levels within a tissue.

A) blood flow to the area decreases

B) the precapillary sphincters relax

C) vasomotion is not a factor

D) the diameter of the supplying capillaries’ entrance narrows

E) the volume of blood arriving at the venules decreases

14) Why do veins have relatively thin walls?

A) It allows a typical vein to change the diameter of its lumen.

B) It allows a typical vein to be stretched as its diameter increases during ventricular systole.

C) A typical vein’s wall allows exchange to occur quickly by diffusion across endothelial cells or through gaps between adjacent endothelial cells.

D) A typical vein does not need to withstand much pressure.

E) There are sphincters associated with the walls of veins, which allow vasomotion to occur.

15) What is the advantage of the small diameter of capillaries?

A) It dampens the rise in pressure during ventricular systole.

B) It slows blood flow, allowing sufficient time for exchange of materials across capillary walls to occur.

C) It absorbs the pressure changes that occur during the cardiac cycle.

D) It allows the vessels to overcome the force of gravity.

E) It prevents the backflow of blood, improving venous return.

16) Choose the correct description of a typical medium-sized vein.

A) In these vessels, the thin tunica media is surrounded by a thick tunica externa composed of elastic and collagen fibers.

B) Ranging from 2 mm to 9 mm in diameter, its thin tunica media consists of one to two layers of smooth muscle cells.

C) It has a diameter of approximately 0.4 cm and has more smooth muscle cells and fewer elastic fibers.

D) Ranging from 2 mm to 9 mm in diameter, its tunica media contains several smooth muscle layers, and the relatively thick tunica externa has longitudinal bundles of elastic and collagen fibers.

E) It has a diameter up to 2.5 cm, and its tunica media is dominated by elastic fibers rather than smooth muscle cells.

17) Which of the following is defined as a force exerted against a liquid?

A) osmotic pressure

B) peripheral resistance

C) turbulence

D) vascular resistance

E) hydrostatic pressure

18) Which of the following is a transport mechanism used to move materials across capillary walls?

A) pinocytosis

B) filtration

C) venoconstriction

D) endocytosis

E) exocytosis

19) Edema is defined as a(n)

A) trauma to the blood.

B) constriction of vessels.

C) release of bone fragments.

D) abnormal accumulation of interstitial fluid in the tissues.

E) net movement of water from the interstitial fluid to the bloodstream.

20) The difference between the systolic and diastolic pressures is the

A) capillary pressure.

B) pulse pressure.

C) arterial pressure.

D) venous pressure.

E) hydrostatic pressure.



11) Which blood vessels able to absorb the pressure changes : 1200328

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