What is the main idea in the antibody-antigen relationship?

Antibodies sacrifice themselves like crazy.

Antibodies and Antigens work together to destroy the immune system.

Antibodies sacrifice themselves like crazy.

Antibodies fight off antigens by secreting parasitic toxins.

How Well Do You Know Your Immune System?

1.

Which of the following are barriers in the innate immune system? (Select all that apply)
- A.
  
  Skin
- B.
  
  Mucus
- C.
  
  Hair
- D.
  
  Oils
- E.
  
  Fingernails
- F.
  
  Tears
Correct Answer(s)
A. Skin
B. Mucus
D. Oils
F. Tears

Explanation
The innate immune system is the body's first line of defense against pathogens. Skin acts as a physical barrier, preventing the entry of microorganisms. Mucus traps pathogens and prevents them from reaching the body's tissues. Oils, produced by the skin, contain antimicrobial properties that help protect against infections. Tears contain enzymes and antibodies that can kill pathogens. Therefore, skin, mucus, oils, and tears are all barriers in the innate immune system.

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2.

How many types of T-cells are there?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
Correct Answer
D. 4

Explanation
There are four types of T-cells. T-cells are a type of white blood cell that play a crucial role in the immune response. The four types of T-cells are helper T-cells, cytotoxic T-cells, memory T-cells, and regulatory T-cells. Helper T-cells assist other immune cells in recognizing and attacking pathogens. Cytotoxic T-cells directly kill infected cells. Memory T-cells "remember" previous infections to mount a faster response in case of reinfection. Regulatory T-cells help to suppress the immune response and prevent excessive inflammation.

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3.

The cell-mediated immune response is associated with B-cells.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The cell-mediated immune response is not associated with B-cells. B-cells are responsible for the humoral immune response, which involves the production of antibodies. The cell-mediated immune response, on the other hand, is primarily carried out by T-cells, which directly attack infected cells. Therefore, the correct answer is False.

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4.

Class 1 MHC molecules are to cytotoxic T-cells as Class 2 MHC molecules are to ______.

Correct Answer
helper T cells
helper T-cells helper T-cells
helper t cells
helper t-cells
helper tcells

Explanation
Class 1 MHC molecules are responsible for presenting antigens to cytotoxic T-cells, which are involved in cell-mediated immune responses and target infected or abnormal cells for destruction. Similarly, Class 2 MHC molecules are responsible for presenting antigens to helper T-cells. Helper T-cells play a crucial role in coordinating and regulating the immune response by activating other immune cells, such as B cells and cytotoxic T-cells. Therefore, the correct answer is helper T cells or helper T-cells.

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5.

What is the main idea in the antibody-antigen relationship?
- A.
  
  Antibodies and Antigens work together to destroy the immune system.
- B.
  
  Antibodies sacrifice themselves like crazy.
- C.
  
  Antibodies fight off antigens by secreting parasitic toxins.
Correct Answer
B. Antibodies sacrifice themselves like crazy.

Explanation
The main idea in the antibody-antigen relationship is that antibodies sacrifice themselves to protect the body from antigens. This means that antibodies bind to antigens and neutralize them, but in the process, the antibodies themselves are destroyed. This self-sacrifice is crucial for the immune system to eliminate harmful antigens and maintain overall health.

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How Well Do You Know Your Immune System?

Which of the following are barriers in the innate immune system? (Select all that apply)

How many types of T-cells are there?

The cell-mediated immune response is associated with B-cells.

Class 1 MHC molecules are to cytotoxic T-cells as Class 2 MHC molecules are to ______.

What is the main idea in the antibody-antigen relationship?