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KMPDC Licensing Exam Physiology — practice by topic

Browse 23 questions across 1 Physiology topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Physiology topics

Blood Vessels and Circulation (23)

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Which epithelium forms the endothelium that lines the tunica intima?Read the answer and worked solution →Which tunic is normally the thickest layer in the wall of a vein?Read the answer and worked solution →What diameter range is typical of a muscular artery?Read the answer and worked solution →Which vessels are the primary site of both resistance and regulation of blood pressure?Read the answer and worked solution →

Worked practice questions

Which epithelium forms the endothelium that lines the tunica intima?

  1. Simple squamous epithelium
  2. Simple columnar epithelium
  3. Stratified cuboidal epithelium
  4. Pseudostratified epithelium
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Correct answer: A. Simple squamous epithelium

1. The innermost tunic of a vessel is the tunica intima, and its lining cell layer is the endothelium. 2. That endothelium is a specialized simple squamous epithelium, one flat cell thick. 3. The same lining runs unbroken through the whole vascular system, including the chambers of the heart. 4. Columnar, cuboidal and pseudostratified linings sit in airways and glands, not on the luminal face of a vessel. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 20 "The Cardiovascular System: Blood Vessels and Circulation", section 20.1 Structure and Function of Blood Vessels_

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Which tunic is normally the thickest layer in the wall of a vein?

  1. The tunica intima
  2. The tunica externa
  3. The tunica media
  4. The basement membrane
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Correct answer: B. The tunica externa

1. Arteries and veins both carry three tunics: intima, media and externa. 2. In an artery the tunica media, packed with smooth muscle and elastic fibers, is the thickest layer. 3. In a vein that pattern inverts: the collagen rich tunica externa is normally the thickest tunic. 4. The tunica intima in a vein is thinner than the externa, so it cannot be the answer. 5. The basement membrane is a component inside the intima, not a tunic in its own right. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 20 "The Cardiovascular System: Blood Vessels and Circulation", section 20.1 Structure and Function of Blood Vessels_

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What diameter range is typical of a muscular artery?

  1. From 0.01 mm to 1 mm
  2. From 0.1 mm to 10 mm
  3. From 1 mm to 100 mm
  4. From 10 mm to 100 mm
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Correct answer: B. From 0.1 mm to 10 mm

1. Further from the heart the elastic fiber content of an artery falls and its smooth muscle rises. 2. Such a vessel is a muscular artery, and its diameter typically runs from 0.1 mm to 10 mm. 3. The upper bound of 10 mm is the same figure that marks the start of the elastic artery range. 4. Values in the 100 mm range exceed the diameter of any systemic artery, so those options fail on scale alone. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 20 "The Cardiovascular System: Blood Vessels and Circulation", section 20.1 Structure and Function of Blood Vessels_

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