Biology Lecture 5: Circulatory System
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Questions and Answers

What is the primary function of red blood cells?

  • To protect the body from foreign invaders
  • To deliver oxygen and some carbon dioxide (correct)
  • To remove waste products from the body
  • To aid in blood clotting

What is the term for blood cells clumping together, blocking circulation and oxygen supply?

  • Agglutination (correct)
  • Thrombosis
  • Hemostasis
  • Coagulation

What is the percentage of water in plasma?

  • 60%
  • 50%
  • 80%
  • 90% (correct)

Which blood type is considered a Universal Acceptor?

<p>Type AB (A)</p> Signup and view all the answers

What is the function of white blood cells?

<p>To protect the body from harmful bacteria and viruses (A)</p> Signup and view all the answers

What is the function of arterioles?

<p>To form smaller blood vessels (D)</p> Signup and view all the answers

What determines an individual's blood type?

<p>The presence or absence of different antigens (B)</p> Signup and view all the answers

What is the term for the number of times the heart beats per minute?

<p>Heart rate (C)</p> Signup and view all the answers

What happens when an individual receives the wrong blood type during a transfusion?

<p>The immune system produces antibodies to attach to antigens (B)</p> Signup and view all the answers

What is the term for the structure that triggers the heartbeat?

<p>SA Node (D)</p> Signup and view all the answers

What is the function of platelets?

<p>To aid in blood clotting (A)</p> Signup and view all the answers

What is the term for the pressure exerted by blood on the walls of blood vessels?

<p>Blood pressure (D)</p> Signup and view all the answers

What is the average lifespan of a red blood cell?

<p>120 days (C)</p> Signup and view all the answers

What is the percentage of red blood cells in the human body?

<p>90% (D)</p> Signup and view all the answers

What is the term for the recovery period of the cardiac cycle?

<p>T wave (D)</p> Signup and view all the answers

What is the term for the graphic representation of the cardiac cycle?

<p>Electrocardiogram (D)</p> Signup and view all the answers

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