The pain produced in an internal organ may be perceived as occurring somewhere else. This phenomenon is called
____.
a. mixed nerve messages
b. referred pain
c. phantom pain
d. psychosomatic pain
e. hypochondria
ANSWER: b
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The carbon dioxide acceptor in the Calvin-
Benson cycle of photosynthesis is
a. phosphoglycerate (PGA). b. ribulose bisphosphate (RuBP). c. phosphoglyceraldehyde (PGAL). d. glucose. e. phosphoenolpyruvate.
An individual with an uncertain vaccine history has been brought to the emergency room after receiving severe lacerations in an accident with farm machinery
In addition to administering a tetanus toxoid vaccine, he is given a shot of tetanus immune globulin (TIG), a form of passive immunization. Why are both necessary? A) The tetanus vaccine provides immediate protection, and the tetanus immune globulin provides long-term protection. B) The doctor is not sure which will work faster in this patient so decides to administer both. C) The tetanus immune globulin is given only when there are severe injuries and a high risk of infection. D) Tetanus immune globulin is always given along with the tetanus vaccine. E) The tetanus immune globulin provides immediate, short-term protection, and the tetanus vaccine provides long-term protection.
Sperm pass through several stages during their development. The earliest stage in which the cell
becomes haploid is the:a. sperm. b. spermatid. c. primary spermatocyte. d. secondary spermatocyte. e. spermatogonium.
Lymphocytes
A. possess MHC antigens for recognizing self. B. gain tolerance to self by destruction of lymphocytes that could react against self. C. have membrane receptors that recognize foreign antigens. D. develop into clones of B and T-cells with extreme variations of specificity. E. All of these choices are correct.