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MOHAP Licensing Exam Blood Vessels and Circulation — practice questions

Explore 23 free Blood Vessels and Circulation questions in MOHAP Licensing Exam Physiology. Open each question or exercise to read its content, reference answers and available explanation.

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Blood Vessels and Circulation questions and exercises with answers

Showing questions 1–23 of 23.

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 →The supply of blood to a tissue by its capillaries is given which name?Read the answer and worked solution →Which capillary type has incomplete basement membranes wide enough to pass whole cells?Read the answer and worked solution →Approximately what share of the blood volume sits in the systemic veins at any moment?Read the answer and worked solution →The venous reserve is the blood held in venous networks within which structures?Read the answer and worked solution →A patient reads 120/80 mm Hg. What is the pulse pressure?Read the answer and worked solution →For a blood pressure of 120/80 mm Hg, what is the approximate mean arterial pressure?Read the answer and worked solution →How many Korotkoff sounds are recognized, and how many are normally recorded?Read the answer and worked solution →Which factor is not among the five variables influencing blood flow and blood pressure?Read the answer and worked solution →Of viscosity, vessel length and radius, which one can the body alter rapidly?Read the answer and worked solution →An arteriole constricts to one half of its original radius. Resistance to flow changes by what factor?Read the answer and worked solution →Regulatory mechanisms are effective enough that a bleeding patient may remain asymptomatic until roughly what fraction of blood volume is lost?Read the answer and worked solution →Where is angiotensin I converted into angiotensin II, and by which enzyme?Read the answer and worked solution →Atrial natriuretic hormone opposes angiotensin II by producing which effect?Read the answer and worked solution →Chronic and persistent readings at or above which value define hypertension?Read the answer and worked solution →Fill the vessel boardRead the answer and worked solution →Merge the wall traitsRead the answer and worked solution →Trace the blood downstreamRead the answer and worked solution →Sort the pressure signalsRead the answer and worked solution →Pick the bigger valueRead 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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