Human Immune System Quiz

Which activity would stimulate the human immune system to provide protection against an invasion by a microbe?

• receiving antibiotic injections after surgery

• choosing a well-balanced diet and following it throughout life

• being vaccinated against chicken pox

• receiving hormones contained in mother's milk while nursing

Pollen grains often stimulate an allergic response that produces

• antigens

• antibodies

• plasma

• platelets

When the antibiotic penicillin was first introduced, it was immediately effective in combating staphylococcus bacterial infections. After a number of years, there were outbreaks of staphylococcal infections that did not respond to treatment with penicillin. The best explanation for this situation is that

• members of the original population of bacteria that were penicillin resistant survived and reproduced, creating a more resistant population

• the bacteria that survived exposure to penicillin learned to avoid it

• the bacteria that caused the new outbreaks were from populations that had never been exposed to penicillin

• during each generation, the bacteria modified their own DNA to increase their ability to resist penicillin and passed this ability on to their descendants

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The immune system of humans may respond to chemicals on the surface of an invading organism by

• releasing hormones that break down these chemicals

• synthesizing antibodies that mark these organisms to be destroyed

• secreting antibiotics that attach to these organisms

• altering a DNA sequence in these organisms

Salmonella bacteria can cause humans to have stomach cramps, vomiting, diarrhea, and fever. The effect these bacteria have on humans indicates that Salmonella bacteria are

• predators

• pathogenic organisms

• parasitic fungi

• decomposers

An infection in the body might result in a sudden

• decrease in the activity of antigens produced by the mitochondria

• decrease in the amount of DNA present in the nuclei of cells

• increase in the activity of white blood cells

• increase in the number of red blood cells

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Which statement does not identify a characteristic of antibodies?

• They are produced by the body in response to the presence of foreign substances.

• They may be produced in response to an antigen.

• They are nonspecific, acting against any foreign substance in the body.

• They may be produced by white blood cells.

The diagram below represents one possible immune response that can occur in the human body.

• A, only

• A and C, only

• B and C, only

• A, B, and C

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A 6-year-old child ate a peanut butter sandwich at snack time in school. Five minutes later, her throat became swollen and she collapsed. This allergic reaction occurred because her body

• recognized an antigen in peanut butter and produced antibiotics against it

• digested the white blood cells that can recognize an antigen in peanut butter

• did not recognize an antigen in peanut butter and could not produce antibodies against it

• recognized an antigen in peanut butter and produced an immune response

The human immune system fights infection by releasing

• ATPs

• antibiotics

• antibodies

• antigens