In microbiology, sensitivity testing determines:
A. which antibiotic will treat a protozoan infection.
B. which antibiotic will effectively treat a bacterial infection
C. which antibiotic will treat a viral infection.
Ans: B. which antibiotic will effectively treat a bacterial infection
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Which of the following statements about "excitable membranes" is correct? (Select all correct choices.)
A. Cells spend a significant amount of energy to pump Na+ out of muscle cells at rest. B. The difference in charge across a plasma membrane is called a membrane potential. C. Acetylcholine released from a nerve cell binds to a ligand-gated ion channel at the plasma membrane of a muscle cell. D. An excitable membrane at rest has a high concentration of Cl- ions outside the cell, which flood into the cell upon the opening of an ion channel.
As the products of photosynthesis are used as the reactants during respiration, these two processes are said to be:
A. antagonistic. B. complementary. C. supplementary. D. symbiotic. E. tangential.
Each of us is part of the ongoing evolution of the human species. Which of the following would have the greatest impact on the future biological evolution of the human population?
A) You work out every day so that you stay physically fit and healthy. B) A mutation occurs in one of your skin cells. C) You move to Hawaii, the state with the longest life expectancy. D) A mutation occurs in one of your sperm or egg cells. E) You encourage your children to develop their intellectual abilities.
Gene has a sore throat with a 101°F fever, coated tonsils, and swollen glands. He should really see a doctor because the bacteria may eventually cause ________ within his body
A) mesothelioma B) emphysema C) disease of the heart valves associated with rheumatic fever D) asthma