Immune System Defenses Quiz
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Questions and Answers

Which of the following helps in defending against pathogens by breaking down their cell walls?

  • Tears and blinking reflex
  • Sweet, sebaceous secretions
  • Acidic pH, hydrolytic enzymes (correct)
  • Lactobacilli

What is the function of lysozymes in the body's defense mechanisms?

  • Promoting cell growth
  • Enhancing vision
  • Breaking down bacterial cell walls (correct)
  • Assisting in blood clotting

Which component of the immune system is responsible for directly attacking virus-infected cells and cancer cells?

  • Complement
  • Interferons
  • Phagocytes
  • Natural killer cells (correct)

What type of proteins are involved in the body's initial response to infection or inflammation?

<p>Acute phase proteins (A)</p> Signup and view all the answers

Which of the following is a physical barrier that prevents pathogens from entering the body?

<p>Intact skin and mucous membrane (D)</p> Signup and view all the answers

Which component of the immune system is responsible for releasing chemicals to help regulate the immune response and promote inflammation?

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

In the body's defense mechanisms, which of the following directly attacks and kills virus-infected cells and cancer cells?

<p>Natural killer cells (A)</p> Signup and view all the answers

Which of the following is a chemical defense mechanism found in tears and certain body fluids, capable of destroying the cell walls of certain bacteria?

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

In the context of the immune system, which factor helps to neutralize pathogens by binding to their surfaces and marking them for destruction?

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

Which of the following types of cells are crucial in eliminating pathogens by engulfing and destroying them in a process known as phagocytosis?

<p>Phagocytes (B)</p> Signup and view all the answers

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