Thyroid hormone is somewhat unique in that it is a
A. protein hormone that is water-soluble.
B. monoamine that is water-soluble.
C. steroid hormone that is lipid-soluble.
D. steroid hormone that is water-soluble.
E. biogenic amine that is lipid-soluble.
Answer: E
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Which of the following describes the fluid mosaic model of the plasma membrane structure?
A) The plasma membrane is composed of two layers of proteins embedded with lipids. B) The lipid bilayer is solid at body temperature, thus protecting the cell. C) The phospholipid bilayer is embedded with associated proteins, cholesterol and sugars and has a dynamic arrangement. D) Phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chains.
A patient is being evaluated for possible breast cancer. Which of the following genetic conditions would indicate the greatest increase risk?
a. Mother developed breast cancer b. Mother had smoked when she was a child c. Paternal aunt has breast cancer d. Paternal grandmother has breast cancer
Which of the following conditions would result in a systemic arterial PO2 lower than is typical of a healthy person at sea level?
A. traveling to high altitude B. breathing 100% oxygen C. having iron-deficiency anemia D. breathing regular air in a hyperbaric chamber (higher that normal atmospheric pressure) E. maintaining alveolar ventilation constant while decreasing metabolic rate
Which type of epithelial tissue would be the least protective?
A. Stratified keratinized B. Stratified nonkeratinized C. Simple columnar D. Transitional E. Simple squamous