★ Immune System Quiz
Which of the following prevents pathogens from ever entering the body?
A. skin
B. sneezing
C. immunity
D. antibodies
Select your answer:
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Anatomy and Physiology Skeletal System › ViewIf blood calcium levels drop below 8.5 mg/dL which hormone(s) is likely to be activated?
A. parathyroid hormone
B. calcitriol
C. calcitonin
D. estrogen
E. both calcitriol and parathyroid hormone
Immunology › View
Antibody are secreted by
A. Macrophage
B. T lymphocytes
C. Plasma cells
D. Neutrophils