Prions are ________.
A. toxins produced in a variety of seafood
B. bacteria that can cause seizures and brain damage
C. naturally occurring toxins formed in damaged grains and nuts
D. infectious proteins associated with mad cow disease
Answer: D
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Increased methylmalonic acid blood levels in the elderly are always related to a vitamin B12 deficiency
a. True b. False Indicate whether the statement is true or false
A condition characterized by an internal body temperature of 105 degrees F due to prolonged exposure to heat and requiring emergency medical care is called:
a. hyponatremia. b. heat exhaustion. c. heat stroke. d. hyperhydration.
The four steps of cancer development are:
a. stage I, stage II, stage III, and stage IV. b. initiation, promotion, development, and progression. c. invasion, transport, escape, and adaptation. d. trigger, growth, proliferation, and metastasis.