Death of hair cells resulting from repeated exposure to loud noises is thought to be caused by metabolic "exhaustion" of these cells from continuous activation.
Answer the following statement true (T) or false (F)
True
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What stimulates the production of antibodies by B-cells?
a. B-cells bind to and recognize specific antigens and immediately start to produce antibodies. b. T-helper cells recognize specific antigens and signal B-cells. c. Antigens are recognized by macrophages as nonself, and macrophages signal B-cells. d. Antibodies are produced any time an antigen enters the body.
________ inhibitors bind the enzyme at a location other than the active site but still interfere with product formation
Fill in the blank with correct word.
In mammals, the __________ is a temporary center for the formation of blood cells
a. amnion b. allantois c. yolk sac d. chorion e. archenterons
What are the structures labeled E in the accompanying figure?
A. Plasmodesmata B. Basement membranes C. Tight junctions D. Gap junctions E. Adhering junctions