At least one aspect of aging has been determined to be the shortening of the ________ with each successive round of cell division.
Fill in the blank(s) with the appropriate word(s).
telomeres
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Lactic acid and ethanol fermentation differ in that:
A. FADH2 is oxidized to FADH in lactic acid fermentation, but NADH is oxidized to NAD+ in ethanol fermentation. B. NADH is oxidized to NAD+ in lactic acid fermentation, but FADH2 is oxidized to FADH in ethanol fermentation. C. lactic acid fermentation produces ATP by substrate level phosphorylation, but ethanol fermentation does not. D. ethanol fermentation produces ATP by substrate level phosphorylation, but lactic acid fermentation does not. E. ethanol fermentation produces CO2, but lactic acid fermentation does not.
Which of the following is true of histamine?
a. causes blood vessels to contract b. causes capillaries to lose their permeability c. causes an outward flow of fluids from the capillaries d. reduces tissue swelling e. causes cells to release interferons
Tubular secretion is essential for ___
homeostasis.
a. pH b. water c. solute d. temperature e. sugar
Conducting tubes of phloem consist of stacks of ____.
A. dead sieve elements B. living sieve elements C. dead vessel elements D. living vessel elements E. dead companion cells