Cardiovascular System Quiz: Blood Vessels and Their Functions
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Questions and Answers

What does the '120' in a blood pressure of 120/80 refer to?

  • Diastolic pressure
  • Pulse pressure
  • Systolic pressure (correct)
  • Capillary pressure
  • Which structures would be subject to the lowest blood pressure?

  • Aorta
  • Vena cava (correct)
  • Atrioventricular valve
  • Pulmonary arteries
  • Why is it advantageous to have blood move slowly in the capillaries?

  • It will not cause damage to the valves
  • It creates a greater osmotic pressure for cells
  • It provides time for substances to be exchanged between blood and tissue fluids (correct)
  • It maintains the high pressure in the capillaries
  • A waitress standing for hours and crossing her legs may increase the chances of having blood accumulate in her:

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

    Which blood vessels have the thickest muscular layer?

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

    What is the main function of capillaries in the circulatory system?

    <p>Exchanging oxygen and nutrients with tissues</p> Signup and view all the answers

    Which layer of blood vessels helps in the regulation of blood pressure?

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

    In what part of the heart does the process of red blood cell formation occur?

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

    Which heart valve is responsible for preventing backflow from the aorta?

    <p>Aortic valve</p> Signup and view all the answers

    Which condition is characterized by the presence of an opening in the atrial septum?

    <p>Atrial septal defect</p> Signup and view all the answers

    What is the role of the AV node in response to lower levels of oxygen?

    <p>Sends faster signals to the SA node</p> Signup and view all the answers

    During the administration of a strong current by a paramedic with paddles, what is the primary objective?

    <p>Restart ventricular contractions that have completely stopped</p> Signup and view all the answers

    In a hypothetical experiment where blood flow is shared between two dogs, if one dog is stressed causing a rapid increase in heart rate, what happens to the heart rate of the second dog?

    <p>Increases due to sympathetic stimulation via the blood</p> Signup and view all the answers

    What is the term for abnormal, dilated blood vessels that occur due to weakening in the blood vessel wall valve?

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

    What effect does the hormone epinephrine have on the heartbeat?

    <p>Inhibits the heartbeat</p> Signup and view all the answers

    What role does the brain play in relation to the heartbeat?

    <p>Stimulates or depresses heart rate based on activity and stress</p> Signup and view all the answers

    In which association is the pairing NOT correct?

    <p>Albumin - fights infection</p> Signup and view all the answers

    Why does the SA node send faster signals to the AV node when detecting lower levels of oxygen?

    <p>To ensure ventricles don't contract uncontrollably so the SA node can reestablish coordinated beat</p> Signup and view all the answers

    Which of the following substances would NOT typically be found in the blood?

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

    For 'artificial red blood cells' to be effective and safe, which property would be important?

    <p>Would bind to iron molecules and other artificial blood units</p> Signup and view all the answers

    Which statement about hemoglobin is NOT true?

    <p>Normally found free in the plasma</p> Signup and view all the answers

    What determines whether an artery or vein is defined as such?

    <p>Whether they leave or enter the heart</p> Signup and view all the answers

    If arteries and veins were defined by oxygenation status, which pair would need to be switched?

    <p>Pulmonary artery and vein</p> Signup and view all the answers

    Which phenomenon is described in the text when pressing your thumb against the thick portion of your hand?

    <p>Temporary color change without depression</p> Signup and view all the answers

    What is the most likely explanation for the thumbprint leaving an indented area on swollen feet?

    <p>Fluid accumulation in tissues from capillary pressure</p> Signup and view all the answers

    What effect does pressing the skin have on blood vessels based on the text?

    <p>Forces blood into surface capillaries</p> Signup and view all the answers

    Why does the thumbprint leave no depression upon removal according to the text?

    <p>Quick return of blood to capillaries</p> Signup and view all the answers

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