Agriculture began in some countries as recently as _____ years ago
Fill in the blank(s) with correct word
6,000
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Which of the following are functions of proteins?
A) support B) defense C) metabolic regulation D) buffering E) All of these are functions of proteins.
Upon swallowing, food moves from the mouth directly into the
A) oral vestibule. B) buccal cavity. C) sublingual space. D) oropharynx. E) oral mucosae.
Drug X is a new drug to treat Alzheimer's Disease. This drug is able to cross the blood-brain barrier and circulate in the CSF. The drug is slightly acidic and at the recommended dose it decreases the CSF pH from 7.4 to 7.3. Will Drug X have any effect on respiration?
A. It will cause a decrease in respiratory rate. B. It will have no effect on respiratory rate, but will cause the patient to take shallower breaths. C. It will cause an increase in respiratory rate. D. It will have no effect on respiratory rate, but will cause an increase in depth of breathing. E. It will not impact respiratory function.
Which of the following is NOT a property of enzymes?
a) Enzymes are catalytic proteins. b) Enzymes are highly specific. c) Enzymes are efficient. d) Enzymes are subject to a variety of cellular controls. e) Enzymes are irreversibly changed by the reactions that they catalyze.