All amino acids enter the cellular respiration pathway at the citric acid cycle.
Answer the following statement true (T) or false (F)
False
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The approximate number of white blood cells in a cubic millimeter of blood is:
a. 7,500 b. 75,000 c. 750,000 d. 7,500,000
Which is not a membrane-bound organelle?
A. Endoplasmic reticulum B. Lysosome C. Golgi apparatus D. Peroxisome E. All of the choices are membrane-bound organelles.
At rest, active sites on the actin are blocked by
A) Myosin molecules. B) Troponin molecules. C) Tropomyosin molecules. D) Calcium ions. E) ATP molecules
Blood O2 levels
A. within the normal PO2 range have little effect on regulation of respiration. B. never change enough to influence respiration. C. are more important than CO2 levels in the regulation of respiration. D. in venous blood and arterial blood are about the same. E. need to change only slightly to cause a change in respiration rate.