The major steps in oxidative phosphorylation include all of the following except
A) removal of hydrogen atoms from a substrate molecule by coenzymes.
B) ionization of hydrogen atoms.
C) decreasing the energy level of electrons passing through the electron transport chain.
D) the breaking of carbon-carbon covalent bonds.
E) the acceptance of electrons by oxygen atoms.
D
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Which of the following would NOT be an example of an enzyme?
A. A molecule that remains unchanged after assisting in a chemical reaction B. A molecule that helps to form the cytoskeleton of a cell C. A molecule that assists in the breakdown of proteins into amino acids in the stomach D. A molecule that breaks down sucrose into glucose and fructose
How do the lymphatic and immune systems contribute to osteoporosis?
A. Excessive smoking lowers estrogen levels, which increases bone loss. B. Immune cells resist infections and release chemicals that promote tissue repair. C. Calcium ions released from the bones are excreted. D. Lack of exposure to sunlight reduces vitamin D production and decreases calcium absorption. E. Decreased estrogen levels following menopause contribute to the disease.
Except for the sense of ________, all sensory information is relayed through the thalamus.
A. balance B. vision C. smell D. taste
Dehydration causes _______.
A) increased thirst. B) increased levels of aldosterone. C) fluid to shift from the ECF to the ICF. D) decreased secretion of ADH. E) All of the answers are correct.