Negative nitrogen balance is commonly seen in individuals who
A. have lost blood or are malnourished.
B. are pregnant or growing.
Answer: A
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Each of the following lists some of the tissue layers of the digestive tract. Which one has them in correct order from lumen to external surface?
A) Lamina propria, muscularis mucosae, submucosa, muscularis externa, serosa B) Mucosa, submucosa, muscularis mucosae, muscularis externa, lamina propria C) Mucosa, submucosa, muscularis externa, lamina propria, serosa D) Mucosa, muscularis mucosae, submucosa, muscularis externa, lamina propria E) Serosa, lamina propria, submucosa, muscularis mucosae, muscularis externa
The standard unit of heat energy used in energy balance is the ____________________
Fill in the blank(s) with correct word
The aortic valve prevents backflow of blood from entering the left ventricle during ventricular diastole
Indicate whether the statement is true or false
Which of the following is not true of phospholipids?
A. They consist of a phosphate-containing head and two fatty acid tails. B. The heads of the phospholipids face towards the extracellular fluid. C. The phosphate-containing heads are hydrophilic. D. The fatty acid tails are hydrophilic. E. They comprise the majority of lipids in the plasma membrane.