Arteries Unveiled

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Questions and Answers

Which layer of an artery maintains elasticity and contractility?

  • Tunica externa
  • Tunica interna
  • Endothelium
  • Tunica media (correct)

What is the term for the alternate blood route from an anastomosis?

  • Collateral circulation (correct)
  • Arterioles
  • End arteries
  • Capillaries

What type of blood vessels connect arterioles and venules?

  • Muscular arteries
  • Capillaries (correct)
  • Elastic arteries
  • Arteries

Which type of blood vessels regulate blood flow through true capillaries?

<p>Pre-capillary sphincters (C)</p> Signup and view all the answers

What are the characteristics of venules?

<p>They are formed from the union of several capillaries (D)</p> Signup and view all the answers

What is the function of blood reservoirs in the cardiovascular system?

<p>To store blood and move it to other parts of the body (C)</p> Signup and view all the answers

Which type of blood vessels carry blood away from the heart to the tissues?

<p>Arteries (A)</p> Signup and view all the answers

What is the term for the distal ends of two or more vessels uniting?

<p>Anastomosis (A)</p> Signup and view all the answers

What is the function of arterioles in regulating blood flow?

<p>Delivering blood to capillaries (B)</p> Signup and view all the answers

Which type of blood vessels are composed of only a single layer of cells and a basement membrane?

<p>Capillaries (C)</p> Signup and view all the answers

What is the term for the extensive capillary network throughout the tissue?

<p>Capillary network (B)</p> Signup and view all the answers

What are large arteries referred to as?

<p>Elastic arteries (A)</p> Signup and view all the answers

What is the term for arteries that do not anastomose?

<p>End arteries (C)</p> Signup and view all the answers

What is the term for the decrease in the size of the lumen of a blood vessel?

<p>Vasoconstriction (A)</p> Signup and view all the answers

What is the term for the increase in the size of the lumen of a blood vessel?

<p>Vasodilation (B)</p> Signup and view all the answers

What is the term for the interruption of blood supply to a whole segment of an organ?

<p>Occlusion (A)</p> Signup and view all the answers

Which type of blood vessels have thinner walls and less smooth muscle compared to arteries?

<p>Veins (B)</p> Signup and view all the answers

What is the term for the rings of smooth muscle fibers that regulate blood flow through true capillaries?

<p>Pre-capillary sphincters (B)</p> Signup and view all the answers

Which type of blood vessels are wider, more tortuous, and specialized for the functions of specific organs?

<p>Sinusoids (B)</p> Signup and view all the answers

What is the term for small vessels that are formed from the union of several capillaries and merge to form veins?

<p>Venules (C)</p> Signup and view all the answers

What are the characteristics of continuous capillaries?

<p>They have no smooth muscle (B)</p> Signup and view all the answers

What is the term for the blood vessels that contain valves to prevent backflow of blood?

<p>Veins (C)</p> Signup and view all the answers

What can weak valves in veins lead to?

<p>Varicose veins (B)</p> Signup and view all the answers

What is the term for the blood vessels that are veins with very thin walls and no smooth muscle?

<p>Sinusoids (C)</p> Signup and view all the answers

Where is the largest portion of the blood volume at rest?

<p>Veins (B)</p> Signup and view all the answers

What is the function of blood reservoirs in the cardiovascular system?

<p>They store blood (B)</p> Signup and view all the answers

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