Explain what happens to pyruvic acid if oxygen is not present in sufficient quantities to support the electron transport system.
What will be an ideal response?
When oxygen is not present in sufficient amounts, the NADH + H+ produced during glycolysis begins to unload its hydrogen "baggage" back onto pyruvic acid, reducing it. This addition of hydrogen atoms to pyruvic acid results in the production of lactic acid.
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The process of depositing calcium salts into a tissue is called
A) ossification. B) remodeling. C) resorption. D) osteolysis. E) calcification.
The lungs and heart are located in the ____ cavity
a. abdominopelvic b. dorsal c. thoracic d. cranial
The most important ions used in action potentials of neurons are Na+ and K+ ions.
Answer the following statement true (T) or false (F)
If an X-ray shows a black area in the region of the epiphyseal plate,
A. the bone is fractured. B. the epiphyseal plate has not completely ossified. C. growth of the bone is complete. D. the cartilage is absent. E. marrow is forming in the cancellous bone.