Which vein drains blood from the left side of the thorax and esophagus into the left brachiocephalic vein?
A. hemiazygos vein
B. left azygos vein
C. internal thoracic vein
D. accessory hemiazygos vein
A
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A high count of which of the white blood cells shown in the figure may indicate viral infections?
a) A & B b) B & C c) C & D d) D & E e) E & C
Answer the following statements true (T) or false (F)
1. Without some sort of negative feedback mechanism, it would be impossible to keep our body chemistry in balance. 2. Regardless of the variable being regulated, all homeostatic control mechanisms have at least three interdependent components. 3. The epigastric region is located superior to the umbilical region. 4. Because the ANS is a visceral motor system, afferent pathways are of no importance and actually are rarely found. 5. The rami communicantes are associated only with the sympathetic division of the ANS.
What type of T cell releases cytokines to indirectly rid the body of antigens?
A) helper T cells B) cytotoxic T cells C) regulatory T cells D) killer T cells E) suppressor T cells
What factor causes the production of red blood cells?
A. Erythropoietin B. Thrombopoietin C. Colony-stimulating factors D. A low number of circulating RBCs