When an antigen triggers the multiplication of B lymphocytes, some daughter cells transform into antibody-producing cells and mount an attack, while others become what?
A. Suppressor cells
B. Helper cells
C. Plasma cells
D. Natural killer cells
E. Memory cells
Answer: E
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Which sequence correctly lists the changes that allow the thick and thin filaments to slide past one another in skeletal muscle contraction?
A. Pivot - attach - detach - return B. Attach - detach - pivot - return C. Pivot - attach - return - detach D. Return - pivot - attach - detach E. Attach - pivot - detach - return
What papillae on the tongue are the largest and most numerous?
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Choose the correct statement regarding the structure of the plasma membrane.
A. The hydrophobic center of the plasma membrane will restrict the movement of fat-soluble substances through the membrane. B. The membrane is composed of water-soluble molecules, to allow movement of water between the fluid compartments. C. The movement of proteins in the plasma membrane allows for cellular adaptations to the extracellular environment. D. Carbohydrates in the plasma membrane can serve as a source of immediate energy for the cell.
Tennis elbow is a misnomer for a condition caused by changes in the tendon that attaches the extensor carpi radialis brevis to bone. Discuss the origin and action of this muscle
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