Valves are found in which of the following?
| Tunica intima, tunica media, and tunica adventitia |
| Pia mater, arachnoid mater, and dura mater |
| Tunica media, tunica adventitia, and tunica externa |
| Tunica externa, tunica interna, tunica adventitia |
Internal and external elastic laminae are found in:
| Arteries |
| Capillaries |
| Veins |
| Venules |
Warning
Valves are found in which of the following?
| Arteries |
| Arterioles |
| Capillaries |
| Veins |
When the diameter of the vascular lumen decreases in size, it is called:
| Vasodilation |
| Vasoconstriction |
| Vasoelongation |
| Vasoamplify |
When the diameter of the vascular lumen increases in size, it is called:
| Vasodilation |
| Vasoconstriction |
| Vasoelongation |
| Vasoamplify |
Warning
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Which layer is only found in capillaries?
| Tunica externa |
| Tunica media |
| Tunica interna |
| Tunica adventitia |
Which of the following vessels would have the highest blood pressure?
| Elastic arteries |
| Arterioles |
| Venules |
| Large veins |
Warning
Fenestrated capillaries:
| Consist of a continuous endothelium and continuous basement membrane |
| Contain small pores in the endothelium |
| Contain large discontinuous pores in the endothelium and basement membrane |
| Do not exist |
In which of the following would blood pressure be the lowest?
| Elastic arteries |
| Arterioles |
| Capillaries |
| Vena cava |
Which of the following statements correctly describes a capillary bed?
| Blood pressure is lower at the arterial end than the venous end of the capillary bed |
| Reabsorption occurs at the arterial end and filtration occurs at the venous end |
| High blood pressure and filtration both occur at the venous end of the capillary bed |
| High blood pressure and filtration both occur at the arterial end of the capillary bed |
Which of the following would occur if the pre-capillary sphincters in the metarterioles were to all undergo vasoconstriction at the same time?
| Blood pressure would dramatically increase |
| Heart rate and respiration would increase |
| Blood pressure would dramatically decrease |
| Blood volume would increase |
Approximately what percent of interstitial fluid is not reabsorbed at the venous end of the capillary bed?
| 5-10% |
| 10-15% |
| 20-25% |
| 30-35% |
What is the name of the structure that connects the arteriole and venule sides of a capillary bed?
| Arteriole |
| Metarteriole |
| Precapillary sphincter |
| Venule |
What venous structure collects blood from the upper extremity and head?
| Inferior vena cava |
| Ligamentum arteriosum |
| Superior vena cava |
| Vaso vasorum |
Which of the following would cause vasodilation?
| Decreased sympathetic stimulation |
| Increased sympathetic stimulation |
| Decreased parasympathetic stimulation |
| Increased parasympathetic stimulation |