Humoral immunity is a major defense against:
A) viral infection.
B) bone injury.
C) organ immunity.
D) bacterial infections.
D
Explanation: D) Correct. Humoral immunity is a major defense against bacterial infections.
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The disadvantage of having a longer hinge region in IgG3 compared with the other IgG subclasses is a reduction in its serum half-life because of its susceptibility to _____
a. increased proteolysis by serum proteases b. clearance by erythrocytes via FcR binding c. immune complex formation and deposition in kidney glomeruli d. complement fixation and uptake by cells bearing receptor CR1 e. opsonization by neutrophils.
The heart is divided by a partition called the:
A) septum. B) ventricle. C) atrium. D) all of the above
Exposure to UV rays appears to be the most important environmental factor in developing skin cancer.
Answer the following statement true (T) or false (F)
This component of an active and healthy school environment is important because children's level of physical activity can be increased by participating in outdoor activities
A) Sun safety instruction B) Physical activity breaks C) Quality physical education D) Nutrition and healthful eating activities