HPCSA Board Exam Blood Vessels and Circulation — practice questions
33 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice HPCSA Board Exam Blood Vessels and Circulation in the app →Which epithelium forms the endothelium that lines the tunica intima?Which tunic is normally the thickest layer in the wall of a vein?Why must the vasa vasorum of a large artery run in the outer layers of the wall rather than close to the lumenEndothelins released by the endothelium act on the vessel wall in which way?An artery larger than 10 mm in diameter is typically classified as which type?What diameter range is typical of a muscular artery?Which vessels are the primary site of both resistance and regulation of blood pressure?The supply of blood to a tissue by its capillaries is given which name?Which capillary type has incomplete basement membranes wide enough to pass whole cells?Continuous capillaries of the brain differ from other continuous capillaries in which way?Why are the precapillary sphincters of the body normally held closed?Approximately what share of the blood volume sits in the systemic veins at any moment?The venous reserve is the blood held in venous networks within which structures?A patient reads 120/80 mm Hg. What is the pulse pressure?A patient has a blood pressure of 130/105 mm Hg. How should this pulse pressure be classified?For a blood pressure of 120/80 mm Hg, what is the approximate mean arterial pressure?A mean arterial pressure held below 60 mm Hg for an extended period leads to what?How many Korotkoff sounds are recognized, and how many are normally recorded?Which factor is not among the five variables influencing blood flow and blood pressure?Of viscosity, vessel length and radius, which one can the body alter rapidly?An arteriole constricts to one half of its original radius. Resistance to flow changes by what factor?A capillary is narrower than an arteriole, yet arterioles offer the greatest resistance in the network. Why?Regulatory mechanisms are effective enough that a bleeding patient may remain asymptomatic until roughly what Venoconstriction raises pressure inside a vein and raises flow as well. What explains the rise in flow?At the arterial end of a capillary the CHP is 35 mm Hg and the BCOP is 25 mm Hg. What is the net filtration prAt the venous end of a capillary the CHP is about 18 mm Hg while the BCOP holds at 25 mm Hg. What follows?About 24 liters of fluid are filtered from capillaries each day and 20.4 liters are reabsorbed. What becomes oBlood pressure rises sharply. What does the baroreceptor reflex do next?Where is angiotensin I converted into angiotensin II, and by which enzyme?How does the myogenic response answer a sharp rise in flow through an arteriole?Atrial natriuretic hormone opposes angiotensin II by producing which effect?Chronic and persistent readings at or above which value define hypertension?In the immediate response to blood loss, what does constriction of the veins achieve?