Which of the following is a possible symptom of osteoporosis?
A. vertebral crush fractures
B. reduced body height
C. dowager's hump
D. all of the above
D. all of the above
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Which best describes a "myofibril"?
A. It is composed of a single type of protein and forms cross-bridges. B. It is a cylindrical cellular organelle composed of myofilaments. C. It is a single skeletal muscle cell. D. It is a fibrous junction between a muscle cell and a tendon. E. It is a hollow membranous structure that stores calcium.
A laboratory rat has an electrode implanted in its brain. By pressing a metal bar in its cage, the animal can activate the electrode. You are analyzing the data from the most recent experiment day and find that the rat pressed the bar over and over again. The rat did not even eat during the experimental period because it was too busy pressing the bar. In which location is the electrode likely to be implanted?
A. Occipital lobe B. Frontal lobe C. Hypothalamus D. Mesolimbic system E. All of the choices are possible locations of the electrode.
Which of the following is a receptor that may be either excited or inhibited by acetylcholine?
A. Beta-adrenergic receptor B. Nicotinic receptor C. Muscarinic receptor D. Enteric receptor E. Alpha-adrenergic receptor
The adductor longus is named for its
A. function and orientation. B. origin and insertion. C. location and size. D. type and shape. E. function and size.