What basic reactants do mitochondria absorb from the cytosol to synthesize ATP?
A) carbon dioxide, GTP, sodium and phosphate ions
B) oxygen, ADP, phosphate ions, and organic substrates
C) oxygen, creatine phosphate, and ADP
D) carbon dioxide, water, glycogen, and inorganic substrates
E) water, lactate, GTP, and ADP
Answer: B
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It is the ________ that permits the compression necessary to pump large volumes of blood out of the ventricles.
A. arrangement of cardiac muscle in the heart wall B. presence of skeletal muscle tissue in the heart skeleton C. negative pressure inside the ventricles D. presence of papillary muscles in the ventricles E. absence of oxygenated blood in the atria
An injured athlete undergoes a surgical procedure where their doctor makes an incision in their knee and inserts a small camera to view the meniscus. This procedure is called ________.
Fill in the blank(s) with the appropriate word(s).
If the pH of the stomach is 2 what is the [H+]?
A) 1X10-2 mol/L B) .2 mol/L C) 200 mol/L D) 2 mol/L E) .10 mol/L
Why do our cells need enzymes?
A) Enzymes are important sources of nutrients. B) Enzymes are important inorganic compounds used by cells. C) Enzymes provide the activation energy of a reaction so it can occur. D) Enzymes lower the activation energy of a reaction so it can occur. E) Enzymes increase the activation energy of a reaction so it can occur.