T-lymphocytes in the thymus gland do not participate in the immune response and are protected from antigens by
A. the blood-thymus barrier.
B. the low pH of the thymus gland.
C. thymic macrophages.
D. trabecular fibers.
E. circulating B-lymphocytes.
Answer: A
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Answer the following statement true (T) or false (F)
Typically, at the moment a full-term baby is born, the child's lungs are
A. fully inflated due to practice respiratory movements in the womb. B. not fully inflated, but they will inflate within about ten seconds. C. not fully inflated, and will not inflate fully for ten days, when surfactant production begins.
In your observations of microscopic slides of cartilage and bone, you can see that chondrocytes and osteocytes are both encased in lacunae.
Answer the following statement true (T) or false (F)
Showing your palm to someone who is in front of you, as if to tell them "Stop," requires ________.
A. hyperextension of the wrist B. flexion of the wrist C. dorsiflexion of the hand D. abduction of the wrist E. hyperextension of the metacarpophalangeal joints