Immunity audiobook cover - The importance of our immune system

Immunity

The importance of our immune system

William E. Paul

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Key Takeaways from Immunity

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Immunity
The Dual Nature of Immunity+
Three Immune Responses+
Three Laws of Immunity+
Immunity and Cancer+

Quiz — Test Your Understanding

Question 1 of 8
How did Edward Jenner discover the concept of vaccination?
  • A. By observing that milkmaids who contracted cowpox were subsequently immune to smallpox.
  • B. By isolating the smallpox virus in a laboratory setting and weakening it.
  • C. By noticing that people with type 1 diabetes did not contract smallpox.
  • D. By studying the mucus membranes of patients who naturally survived smallpox.
Question 2 of 8
According to the text, what happens when the immune system malfunctions in the case of type 1 diabetes?
  • A. The body fails to produce dendritic cells to fight off incoming infections.
  • B. T cells mistakenly break down the body's own insulin-producing cells.
  • C. The body produces an overabundance of mucus that traps and destroys healthy cells.
  • D. The innate immune system completely shuts down, leaving the body vulnerable.
Question 3 of 8
Which of the following correctly describes the 'adaptive immunity' response?
  • A. It acts as a physical barrier, like mucus, to trap bacteria before they enter cells.
  • B. It uses general cells that all have the exact same capacity to find and destroy any pathogen.
  • C. It relies exclusively on regulatory T cells to stop the body from attacking its own tissue.
  • D. It produces highly specialized cells to fight a specific threat and retains some of these cells to protect against future attacks.
Question 4 of 8
Why was Paul Ehrlich's initial theory about how antibodies target specific antigens ultimately rejected?
  • A. He believed that regulatory T cells were solely responsible for producing antibodies.
  • B. He incorrectly assumed that the universe of potential antigens was quite limited.
  • C. He thought that antibodies could only be produced after a pathogen had destroyed a cell.
  • D. He failed to account for the physical barrier provided by mucus in the airway.
Question 5 of 8
What is the primary function of regulatory T cells (Tregs) in the immune system?
  • A. To clone specific lymphocytes in vast quantities when a new pathogen enters the body.
  • B. To interpret the nature of a threat before ordering standard T cells to attack.
  • C. To prevent the immune system from attacking the body's own cells.
  • D. To act as a physical barrier against invading bacteria in the human airway.
Question 6 of 8
What did Richard Locksley’s experiment with mice and the Leishmania major parasite demonstrate about the immune response?
  • A. The sheer intensity and number of T cells is the most critical factor in defeating a parasite.
  • B. Mice lack the regulatory T cells necessary to fight off parasitic infections effectively.
  • C. The success of the immune response depends on deploying the appropriate type of T cells, rather than just the intensity of the response.
  • D. Parasites can only be defeated by the innate immune system, not the adaptive immune system.
Question 7 of 8
What role do dendritic cells play in the immune system according to the law of appropriateness?
  • A. They act as a physical barrier to trap airborne viruses like the flu.
  • B. They interpret the nature of a threat and activate the T cells best suited to destroy it.
  • C. They clone themselves into antibodies when they encounter a recognized antigen.
  • D. They suppress the immune system to prevent autoimmune diseases like diabetes.
Question 8 of 8
How did the 1950s experiment by Richard Prehn and Joan Main suggest that the immune system could fight cancer?
  • A. Mice that had tumors surgically removed rejected the same tumors when they were reintroduced, indicating they had developed an immunity.
  • B. Mice injected with the Hepatitis-B vaccine showed an 84-percent decrease in tumor development.
  • C. Tumors implanted into non-cancerous mice were immediately destroyed by the new host's regulatory T cells.
  • D. Mice given an abundance of dendritic cells were able to shrink their tumors without surgical intervention.

Immunity — Full Chapter Overview

Immunity Summary & Overview

Immunity (2015) is a guide to that great defender of the human body, otherwise known as the immune system. It gives a detailed explanation of how immune responses defend us against all manner of diseases, even cancers, and how a dysfunctional immune system can spell big trouble.

Who Should Listen to Immunity ?

  • Physicians, chemists and biologists
  • Anyone who has ever been sick
  • Students of medicine

About the Author: William E. Paul

William E. Paul, MD, was chief of the Laboratory of Immunology at the National Institute of Allergy and Infectious Diseases, one of the National Institutes of Health. He also served as president of the American Association of Immunologists.

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