Prions can be transmitted by all of the following except
A. surgical instruments.
B. cornea transplants.
C. ingesting meat from infected animals.
D. ingesting brain material.
E. All of the choices have been documented as methods of prion transmission.
Answer: E
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Most species of Gram-positive bacteria are ____
a. photoautotrophic b. photoheterotrophic c. chemoautotrophic d. chemoheterotrophic e. photochemoautotrophic
During inspiration, intercostal muscles function to
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Which of the following events occurs last in an action potential?
a. Opening of voltage-gated Na+ channels b. Closing of voltage-gated Na+ channels c. Opening of voltage-gated K+ channels d. Closing of voltage-gated K+ channels