Oxidative or fermentative media were set up on an organism suspected of being P. aeruginosa. What results would be expected?
a. Yellow in both tubes
b. Green in both tubes
c. Yellow in the open tube and green in the closed tube
d. Green in the open tube and yellow in the closed tube
C
P. aeruginosa is an oxidative organism; therefore only the open tube (i.e., oxidative tube) reacts and produces a yellow color. The fermentative tube (i.e., anaerobic) remains green.
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During an asthma attack, allergens trigger the release of histamine, which causes severe constriction of the __________________.
A. pleural cavities B. trachea C. rib cage D. bronchi E. larynx
Cells that can detect and respond to a hormone are known as
a. target cells. b. regulator cells. c. receptor cells. d. messenger cells. e. endocrine cells.
If a single-celled freshwater organism such as a protistan is transferred to saltwater, which of the following is likely to
happen?
a. The cell will burst. b. The cell will shrink. c. Salt will be pumped out of the cell. d. Salt will be pumped into the cell. e. Enzymes will flow out of the cell.
The descending limb of the loop of Henle is impermeable to water so no passive diffusion occurs
Indicate whether the statement is true or false