Oxygen moves from alveoli to the bloodstream
a. because the concentration of oxygen is greater in alveoli than in the blood.
b. mainly due to the activity of carbonic anhydrase in the red blood cells.
c. by using the assistance of carbaminohemoglobin.
d. through active transport.
e. because the concentration of carbon dioxide is greater in alveoli than in the blood.
A
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Answer the following statement true (T) or false (F)
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a. hypertonic b. hypotonic c. isotonic d. none of these
Small RNAs can regulate gene expression. One type, called micro RNA (miRNA), acts by binding directly to
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A. hypertonic B. hypotonic C. isotonic D. osmotonic E. pretonic