Exam 24: The Body's Defenses

If a person had the thymus gland removed,which of the following would NOT occur in his or her body?

Examine the numerous long structures extending from the surface of some of the cells in the following figure.Cells with these long structures could be found lining ________.

Herd immunity fails when what percentage of the population is NOT vaccinated?

Scenario Questions Read the following scenario to answer the following questions. Avian influenza is a viral infection that naturally occurs in wild birds with few damaging effects. However, avian influenza is highly contagious and can quickly kill domesticated birds. Some human influenza viruses are similar to the avian influenza. People infected with avian influenza develop typical flu symptoms (fever, cough, muscle aches). However, symptoms may become more severe and life-threatening. If avian influenza evolves into a form that is easily transmissible from person to person, a global pandemic of widespread human death might occur. -One way to prevent a global pandemic of avian influenza would be to ________.

Examine the photograph of the hand in the following figure.The person's joints are severely damaged because ________.

Which of the following kinds of proteins circulates in the blood and coats the surfaces of microbes to make them more susceptible to engulfment by phagocytic cells?

Which statement about antigen recognition in B and T cells is TRUE?

________ may destroy infected body cells.

Scenario Questions Read the following scenario to answer the following questions. Avian influenza is a viral infection that naturally occurs in wild birds with few damaging effects. However, avian influenza is highly contagious and can quickly kill domesticated birds. Some human influenza viruses are similar to the avian influenza. People infected with avian influenza develop typical flu symptoms (fever, cough, muscle aches). However, symptoms may become more severe and life-threatening. If avian influenza evolves into a form that is easily transmissible from person to person, a global pandemic of widespread human death might occur. -Humans who are infected with avian influenza are likely to have elevated levels of ________.

What kinds of cells engulf whatever foreign cells and molecules they encounter and recognize?

Suppose that the figure below shows the concentration of antibodies for an antigen produced by Clostridium tetani,a bacterium that causes tetanus.What could trigger the increase in antibody production marked by the arrow?

The figure below shows a Y-shaped antibody molecule.How many antigens can a single antibody molecule bind?

It is best to receive an organ transplant from a donor who ________.

Antibodies ________.

A role of the lymphatic system is to ________.

Scenario Questions Read the following scenario to answer the following questions. Avian influenza is a viral infection that naturally occurs in wild birds with few damaging effects. However, avian influenza is highly contagious and can quickly kill domesticated birds. Some human influenza viruses are similar to the avian influenza. People infected with avian influenza develop typical flu symptoms (fever, cough, muscle aches). However, symptoms may become more severe and life-threatening. If avian influenza evolves into a form that is easily transmissible from person to person, a global pandemic of widespread human death might occur. -Which of the following cells would be active during an immune response to a viral infection?

When a B or T cell is primed by an interaction with its particular antigen,the cell ________.