Which of the following is not true of vitamin B12?
a. It is found almost exclusively in animal-derived foods.
b. It depends on intrinsic factor for absorption.
c. It works closely with thiamin.
d. It converts folate to its active form.
e. It helps maintain nerve cells
Answer: c. It works closely with thiamin.
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AS is a 54-year-old business man who has a family history of lung cancer. AS started smoking at 15; years later, he got what he thought was a very bad cold that lasted for a week, started experiencing pain in his tongue, and was given ibuprofen for pain. He then noticed white sores that were getting bigger in his oral cavity near the tongue. He started feeling generally lousy and was unable to eat because of severe pain; he lost 30 lbs in a month. AS went to the clinic, where they did a biopsy that revealed squamous cell cancer of the tongue. AS has undergone radiation therapy (RT) and surgery to remove the cancer and a restorative surgery was scheduled. Because of the RT, AS has developed mucositis and xerostomia in his oral cavity. All his nodes that were sent to the laboratory tested negative for metastasis, and no further RT was needed. The surgeons felt confident that they had removed all the cancer. HT: 5'11" UBW: 165 lbs WT: 135 lbs Meds: Corticosteroids and antineoplastic (dexamethasone) to reduce inflammation, K depletion, Na retention; and morphine for pain. Given AS's weight loss, what would his MD likely diagnose him with? A. failure to thrive B. anorexia nervosa C. mildly underweight D. moderately underweight E. cancer cachexia
A scientist discovers a chemical in certain rocks that kills bacteria when it is mixed with sterile water in a test tube. She cannot market extracts that contain this chemical as a dietary supplement, because it ________.
A. must first undergo scientific testing to determine its effectiveness B. does not contain dietary ingredients C. has to receive a U.S. patent before the FDA will approve its use D. contains more than one kind of natural material
What population group is the top sugar consumer, taking in more than a half cup of added sugars in foods and beverages each day, or almost 90 pounds of sugar per year?
a. young-adult women b. adolescent boys c. men > 60 years old d. women > 60 years old e. adolescent girls
What is the chemical precursor to dopamine?
a. retrodopa b. levodopa c. monoamine oxidase d. carbidopa e. benserazide