Blood Vessels and Circulation System Quiz
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Questions and Answers

What is the order of blood flow starting from the aorta?

  • Venules, capillaries, veins
  • Arterioles, capillaries, venules
  • Arteries, arterioles, capillaries (correct)
  • Veins, arteries, arterioles
  • Why do arteries and arterioles have thicker walls compared to veins?

  • To allow for easier blood flow
  • To create more space for blood
  • Due to higher pressure from pumped blood (correct)
  • To lower the blood pressure
  • What are vasa vasorum responsible for?

  • Stopping backflow in veins
  • Stopping backflow in arteries
  • Supplying nutrients to large blood vessels (correct)
  • Supplying nutrients to small blood vessels
  • What is the function of nervi vasorum?

    <p>Control contraction and dilation of blood vessels</p> Signup and view all the answers

    Which layer of a blood vessel contains muscles for vasoconstriction and vasodilation?

    <p>Tunica media</p> Signup and view all the answers

    What is the function of the external elastic membrane in blood vessels?

    <p>Separates tunica media from tunica externa</p> Signup and view all the answers

    What is the main factor that affects blood pressure the quickest and most noticeably?

    <p>Vessel diameter</p> Signup and view all the answers

    Where in the circulatory system is the most noticeable slowdown of blood flow?

    <p>At the artery to arteriole junction</p> Signup and view all the answers

    Which hormone is released by the kidneys in response to decreased blood volume and signals water reabsorption to maintain fluid volume and blood pressure?

    <p>Antidiuretic Hormone (ADH)</p> Signup and view all the answers

    What molecule is responsible for allowing fluid to move from tissues to capillaries due to osmotic pressure?

    <p>Dissolved molecules</p> Signup and view all the answers

    What happens during filtration in the capillaries?

    <p>Molecules move from high pressure in capillaries to low pressure in tissue</p> Signup and view all the answers

    What regulates vascular homeostasis through control of vascular tone in the tunica media?

    <p>The nervous system via sympathetic and parasympathetic control</p> Signup and view all the answers

    What is the function of the precapillary sphincters?

    <p>Allowing blood flow into capillaries</p> Signup and view all the answers

    What hormone stimulates hematopoiesis, leading to an increase in blood volume, viscosity, and pressure?

    <p>Erythropoietin (EPO)</p> Signup and view all the answers

    Which type of capillary is associated with being part of the blood-brain barrier?

    <p>Continuous capillary</p> Signup and view all the answers

    What is the main cause of hypovolemic shock?

    <p>Dehydration</p> Signup and view all the answers

    What is the primary function of veins in the circulatory system?

    <p>Preventing backflow of blood</p> Signup and view all the answers

    Which pump function helps counteract gravity and improve blood flow especially in the legs?

    <p>Skeletal muscle pump</p> Signup and view all the answers

    What is the main difference between elastic arteries and muscular arteries?

    <p>Elastic arteries are found nearer the heart</p> Signup and view all the answers

    Which enzyme converts angiotensin 1 into angiotensin 2?

    <p>ACE</p> Signup and view all the answers

    Which measure is an indicator of ventricular contraction in the cardiovascular system?

    <p>Systolic blood pressure</p> Signup and view all the answers

    What is the term for a condition characterized by insufficient blood flow and often accompanied by hypoxia?

    <p>Ischemia</p> Signup and view all the answers

    What is the function of the metarteriole in the circulatory system?

    <p>Regulating blood flow to capillary beds</p> Signup and view all the answers

    Which factor has a direct impact on vascular resistance in the circulatory system?

    <p>Blood viscosity</p> Signup and view all the answers

    What is the formula to calculate Mean Arterial Pressure (MAP)?

    <p>MAP = Systolic BP + Pulse Pressure / 3</p> Signup and view all the answers

    What is the role of compliance in maintaining normal blood pressure?

    <p>Compliance helps expand compartments due to increases in amount</p> Signup and view all the answers

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