Cytoplasm and nucleoplasm are fluids found inside the cell. These are called _____ fluids.
Fill in the blank(s) with the appropriate word(s).
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In addition to serving as building blocks of DNA, what other function do nucleotides perform in a cell?
a. regulate cellular activity b. regulate gene expression c. chaperone protein folding d. activate vesicular transport e. trigger muscle contractions
Physiological responses to chronic stress interfere with ________
a. cardiovascular function only b. the immune system only c. growth only d. all of the choices
According to the text, methamphetamine labs pose all the following risks except:
a. Injury from explosions b. Child endangerment c. Environmental hazards d. The ability to travel without danger to the "cook"
In individuals with normal blood sugar levels, glucose is reabsorbed into the bloodstream in the kidney by members of the GLUT transporter family, which form an aqueous pore across the membrane through which glucose can move passively. As a result, no glucose is excreted in urine. However, in people with untreated diabetes mellitus, blood sugar levels are high and glucose is often present in the urine. What can explain this occurrence?
A. High blood glucose levels reverse the concentration gradient, allowing untransported glucose to be excreted in urine. B. The GLUT transporters cannot hydrolyze ATP quickly enough for ATP to transport the extra glucose, thereby allowing untransported glucose to be excreted in urine. C. The GLUT transporters become saturated, allowing untransported glucose to be excreted in urine. D. High blood glucose levels interfere with the coupled transport of water and glucose, allowing untransported glucose to be excreted in urine.