The semilunar valves are located between the
a. left and right atria.
b. left ventricle and left atrium.
c. both ventricles and the arteries that lead away from them.
d. right atrium and right ventricle.
e. left and right ventricles.
C
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A solution with a pH of 6 has ________ times as many hydrogen ions as a solution with a pH of 8
A) 1,000 B) 10 C) 100 D) 10,000 E) 100,000
__________ are responsible for absorption and anchoring of a plant, while __________ are involved
in photosynthesis. a. Roots; leaves b. Stems; leaves c. Leaves; reproductive structures d. Reproductive structures; stems e. Roots; pollen
A structure consisting of two homologous chromosomes bound together so tightly during the first meiotic prophase that they behave as a single unit is called a ________
Fill in the blank with correct word.
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.