The graph shows the antibody levels in the blood after a person has been exposed twice to the same pathogen. With regard to this pathogen we can conclude that
A. the person has a deficient immune response.
B. the virulence of the pathogen increased between the first and second exposures.
C. antibodies are only produced after a second exposure to the pathogen.
D. memory cells for antibodies against the pathogen exist at the time of the second exposure.
Select your answer:
Topics:
Vision and Hearing Defects Properties of the Hair Kinetics Cybersecurity in Healthcare Biological Molecules and Enzymes Med Term Musculoskeletal Respiratory Diseases Heart and Blood Vessels Bacteria and Protist Review Bacterial Growth The Nervous System Diseases of The Body Systems Multicellular Organisms: Organisation Musculoskeletal Injuries Major OrgansOther quiz:
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A. TRUE
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There are two kidneys, two ureters, one urinary bladder, and one urethra.
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