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Exam 24: The Immune System

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Question 41

Multiple Choice

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Because cytotoxic T cells can recognize viral proteins, they can destroy these infected cells. This is particularly important to individuals with certain kinds of cancers because

A) destroying the infected cells can help slow the spread of the infected cells.
B) destroying the infected cells can help quicken the spread of the infected cells.
C) destroying the infected cells can help prevent future infections of other viruses.

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Question 42

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One kind of vaccine consists of

A) T cells.
B) B cells.
C) a harmless variant strain of a disease-causing microbe.
D) antibiotics.

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Question 43

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Enzymes are to active sites as

Antibody molecules may function by causing the

A physician sees a new patient who is 25 years old. The patient reports that she has been experiencing recurrent ear, nose, and throat problems resulting from various infections since she was about 5 years old. The infections last for long periods of time and are difficult to treat. The physician suspects that the patient may have

Which of the following distinguishes the secondary immune response from the primary immune response?

A woman sustains irreversible damage to her left lung after being injured in a fire. Her identical twin sister, who lives in another state, offers to donate one of her lungs to her injured sibling. Would physicians view this as an organ transplant surgery with a strong chance of success?

Natural killer cells

Which is the correct order of steps taken by B and T cells to defend against infection in body fluids and cells? 1. B and T cells move to the lymph nodes, spleen, and other parts of the lymphatic system. 2) B and T cells leave the bone marrow and thymus and move to the bloodstream. 3) B and T cells meet and begin to fight viruses or other infectious agents. 4) B and T cells develop antigen receptors.

Which of the following cell types is responsible for the cell-mediated immune response?

Which of the following statements about AIDS is true?

Which of the following statements about HIV is false?

Which of the following compounds is produced and secreted by mast cells during an allergic reaction?

Suppose you design a study to test this hypothesis. Your study participants are adults between the ages of 25 and 40 (mean age = 32) . You work with an oncologist to determine if the study participants have an HPV-related cancer, and you also measure the concentration of anti-HPV antibodies in their blood. Answer the following questions regarding this study.After reading the paragraph below, answer the questions that follow. HPV is an infection that is normally fought by the human immune system, but it can lead to cancer in some individuals. While we already know that HPV vaccines help prevent HPV-related cancer, researchers are unsure as to what level of antibody concentration a person needs in order to be protected from HPV-related cancers. Scientists hypothesize that higher anti-HPV antibody levels may provide greater protection from HPV-related cancers compared to lower levels. However, strong evidence does not yet exist to support this hypothesis. -From the following choices, select the groups of individuals who would make the best participants for the experimental group in your study.

The basic function of activated T cells is to battle

The two main functions of the lymphatic system are