A single contraction of all the muscle fibers in a motor unit is known as ____
a. a muscle twitch
b. tetanus
c. summation
d. relaxation coupling
e. isometric contraction
ANSWER: a
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Lactic acid bacteria are used to ferment and produce foods from
A. dairy. B. vegetables. C. meat. D. All of these can be fermented by lactic acid bacteria to make foods.
The organisms isolated from hydrothermal vents are typically
A. phototrophs. B. chemolithoautotrophs. C. rhizobia. D. bacteroid. E. phototrophs, rhizobia AND bacteroid.
In the original experiments by Stanley Miller and Harold Urey to synthesize organic molecules in an abiotic environment, which one of the following would you NOT expect to find in the collection flask?
A. urea B. amino acids C. ATP D. adenine E. formaldehyde
In what way(s) has the successful treatment of mood disorders with prescription drugs changed the historical attitudes toward mental illness?
_____ It has helped people accept that there is a biological basis for mental illnesses, much like other diseases. _____ It has increased the stigma attached to mental illness. _____ It has reinforced the belief that the mentally ill are irresponsible and should be able to make better decisions. _____ It has increased the number of cases of mental illness that go untreated. _____ It has increased the likelihood that many suffering from mental illness may be able to treat symptoms and lead more productive lives.