Central chemoreceptors are neurons in the medulla that respond directly to changes in

A) blood pH.
B) cerebrospinal fluid pH.
C) blood pH and PO2.
D) cerebrospinal fluidPO2.
E) cerebrospinal fluidPO2 and pH.


Answer: B) cerebrospinal fluid pH.

Biology & Microbiology

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The largest demand in the global ecological footprint is caused by our ___

a. gasoline needs b. fishing needs c. farmland needs d. energy needs e. none of the above

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The taxonomic subdivision immediately below the level of a kingdom is a 

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How are L-forms different than Mycoplasma bacteria?

A) L-forms have never had a cell wall. B) L-forms live inside plant cells. C) L-forms are susceptible to antibiotics that target the cell wall. D) L-forms are resistant to certain environmental stresses like boiling and autoclaving. E) L-forms live inside animal cells.

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