When large numbers of antibodies encounter their antigenic targets, they interact to form a three-dimensional structure known as a(n)
A) immune complex.
B) antigen-presenting cell.
C) antigenic determinant site.
D) major histocompatibility complex.
E) antigen-antibody complex.
Answer: A
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When the body removes CO2 by way of the respiratory system:
a. it lowers the pH of the blood b. it raises the pH of the blood c. it has no effect on pH because CO2 is neither an acid nor a base d. it is acting as a buffer
The fiber pathway most superficial in the lateral column is the ________.
Fill in the blank(s) with the appropriate word(s).
The type of muscle cell that lacks transverse tubules, has a single nucleus, and is under
involuntary control is A) skeletal muscle. B) striated muscle. C) smooth muscle. D) cardiac muscle.
Which of the following is not a function of the skeletal system?
A. It stores and releases minerals. B. It produces blood cells. C. It removes toxins from the blood. D. It protects the viscera. E. It produces vitamin C.