A 45-year-old woman receiving chemotherapy for breast cancer complains of nausea, abdominal pain, bloody diarrhea, and malnutrition
Her symptoms most likely reflect toxicity of the chemotherapy toward which of the following gastrointestinal cell types?
A. smooth muscle
B. parietal cells
C. pancreatic acinar cells
D. hepatocytes
E. epithelial cells
ANS: E
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When placed into water, the ionic compound NaCl will
A. decompose. B. bond more strongly to each other. C. dissociate into Na+ and Cl- ions. D. bond covalently with water molecules, forming HCl and NaOH.
Villi
A. are found throughout the gastrointestinal tract. B. generate movement of materials in the large intestine. C. increase surface area in the small intestine. D. contain both smooth and skeletal muscle fibers. E. All of the choices are correct.
The structure in which cells repeatedly divide to produce new cells that form a hair is the
A. hair matrix. B. Merkel region. C. hair shaft. D. lunula.
When our body temperature rises above 37°C or 98°F, a negative feedback mechanism will be triggered to lower the body temperature. As a result, our sweat glands release sweat to cool the body temperature. What part of the negative feedback mechanism is the sweat gland?
A) stimulus B) effector C) receptor D) control center