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:
Name that Pathogen Oral Hygiene Nature of Science Eyes Protein Synthesis Enzymes The Cardiovascular System: Blood Vessels and Hemodynamics Head and Neck Anatomy BTEC Biological Approach Revise Deficiency Diseases Disease Prevention Blood types and Blood Components PHE Healthy Lifestyle Digestive System and Nutrition Chronic Diseases Bones, Joints and MusclesOther quiz:
Gastroenterology › ViewWhich if the following is a good way to strengthen your digestive system?
A. Eat lean meat, and lots of fiber
B. there is no way to strengthen your digestive system.
C. Eat steak
D. Have junk food everyday
Meiosis and intro to Genetics › View
Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?
A. 0%
B. 25%
C. 50%
D. 100%