Which of the following statements regarding the secretions of immune system cells is TRUE?
A. Type 2 interferons are only secreted by macrophages.
B. Interleukin 2 is a cytokine secreted by most immune cells.
C. Type 1 interferons are also called interferon-gamma.
D. Colony-stimulating factors are secreted mainly by plasma cells.
E. Antibodies are produced and secreted by macrophages.
B
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How do veins prevent the backflow of blood?
A) Gravity B) Pressure C) Valves D) Bulk flow
Anatomical features that appear or undergo significant change during the third trimester include
A) the testes descending in male fetuses. B) formation of the plicae of the intestines. C) completion of the formation of the nephrons. D) completion of pulmonary branching and alveolar formation. E) All of the answers are correct.
Sweat and salivary gland are endocrine glands
Indicate whether the statement is true or false
What does structure "A" represent on the diagram?
A. Tendon B. Fibrous capsule C. Articular cartilage D. Synovial membrane E. Bursa