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:
Cholera Pathophysiology - Inflammation Circulation of Blood Vaccines Muscular Physio Intro Practice Diseases Key Terms Mechanical Digestion Human Excretory System Cardiovascular Physiology - Function Nasal Polyp Pharmacology Vitamins Thyroid Gland Vision (AP Psych) Blood/Lymphatic/ImmuneOther quiz:
Homeostasis and Disease › ViewWhich of these would be a chronic condition?
A. sprained ankle
B. tendonitis
C. twisted knee
D. acute appendicitis
Cardiovascular › View
Mitral Valve area can be auscultated in what area?
A. 2nd left intercostal space
B. Left lower sternal border in the 4th and 5th intercostal space
C. 5th intetcostal space at around left mid clavicular line
D. 2nd right intercostal space