Describe the anatomy of the pulmonary system
The pulmonary system includes the upper and lower respiratory tracts. The upper respiratory tract includes the nose, nasal cavity, frontal and maxillary sinuses, larynx, and trachea. The lower respiratory tract includes the lungs, bronchi, and alveoli.
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Solid fats generally have a high proportion of ________ fatty acids.
A. saturated B. unsaturated C. monounsaturated D. polyunsaturated
A circular muscle that can open and close and acts to regulate the flow of materials in one direction is referred to as ________.
A. peristalsis B. a pump C. enterohepatic circulation D. a sphincter
Tabitha is a 19-year-old African American who wants to follow recommendations of the 2015-2020 Dietary Guidelines for Americans. According to the guidelines, Tabitha should
A. reduce her sodium intake to 2500 mg/day. B. take a dietary supplement that contains vitamin A daily. C. limit her intake of added sugars to less than 10% of her total caloric intake. D. drink at least two servings of alcohol daily.
After removal of nitrogen from an amino acid, the carbon skeleton that is left CANNOT be used for
A. glucose synthesis. B. neurotransmitter synthesis. C. ketone body synthesis. D. energy source. E. fat synthesis.