Answer the following questions true (T) or false (F)
1. Viral meningitis is usually more serious than bacterial meningitis.
2. Tetanospasmin blocks the release of stimulatory neurotransmitters.
3. Clostridium botulinum can grow in the intestinal tracts of both infants and adults.
1. FALSE
2. FALSE
3. FALSE
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Some human infants, especially those born prematurely, suffer serious respiratory failure because of _____
A) the sudden change from the uterine environment to the air B) the overproduction of surfactants C) the incomplete development of the lung surface D) lung collapse due to inadequate production of surfactant E) mutations in the genes involved in lung formation
In which of the following ways does a root
differ from a shoot?
a. a root only has apical meristems -- a shoot could have both b. a root lacks an epidermis- a shoot does not lack an epidermis c. roots lengthen when cells above the apical meristem elongate- in shoots, cell elongation below the apical meristem causes the shoot to lengthen d. in a root the apical meristem at the tip never changes its position- in shoots the apical meristem does change its position as the stem elongates e. all of these are differences between roots and shoots
At rest, the inside of the neuron is
A. negatively charged. B. neutral, or equal to the exterior charge. C. positively charged. D. None of the choices are correct, since neurons are never at rest.
pH 4 is ______________x more acidic than pH 7.
Fill in the blank(s) with the appropriate word(s).