Question 1

Which of the following best describes the difference between nonspecific (innate) and specific (adaptive) defense mechanisms in the immune system?

Accepted Answer

Nonspecific defenses act against a broad range of pathogens without memory, while specific defenses target particular pathogens and have a memory component.

Question 2

Which of the following is a key factor in determining the health risk of a pathogen?

Accepted Answer

Its means and ease of transmission and its virulence.

Question 3

Which cells are primarily responsible for the production of antibodies in the specific immune response?

Accepted Answer

B cells

Question 4

Which of the following is NOT a component of nonspecific (innate) defense mechanisms?

Accepted Answer

Antibody production

Question 5

AIDS is caused by a virus that primarily targets which type of immune cell?

Accepted Answer

Helper T cells

Question 6

Which of the following best explains why the immune system can remember specific pathogens?

Accepted Answer

Because specific defense mechanisms involve memory cells that recognize and respond more rapidly to previously encountered pathogens.

Question 7

Which of the following is an example of inappropriate immune system activity?

Accepted Answer

Development of allergies

Question 8

Which of the following statements about nonspecific defense mechanisms is TRUE?

Accepted Answer

They are also known as innate defenses and are present at birth.

Question 9

Which of the following best describes the role of inflammation in the immune response?

Accepted Answer

It is a nonspecific defense mechanism that helps recruit immune cells to the site of infection.

Question 10

Which of the following is a characteristic of specific defense mechanisms?

Accepted Answer

They involve the production of antibodies and T cells that recognize and inactivate pathogens.

Question 11

If a patient is exposed to a pathogen for the first time, which immune response is activated and what is the expected lag time before antibodies are produced?

Accepted Answer

Primary immune response; lag time of 3-6 days

Question 12

Which of the following best describes the function of memory cells in the immune system?

Accepted Answer

They store information about specific antigens for faster response upon re-exposure.

Question 13

Which of the following is a plausible consequence of a deficiency in helper T cells?

Accepted Answer

Impaired activation of both B cells and cytotoxic T cells

Question 14

Which of the following best explains why antibiotics are ineffective against viral infections?

Accepted Answer

Viruses lack the cellular structures targeted by antibiotics.

Question 15

Which of the following immune responses is most likely to be impaired in a patient with AIDS?

Accepted Answer

Activation of cytotoxic T cells

Immune System and Mechanisms of Defense: Human Biology Study Notes

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