What is the action of the binding of muscarine to its receptors in the digestive system?
A. Alpha subunits bind to K+ channels, open them, leading to hyperpolarization.
B. Beta-gamma subunits bind to K+ channels, open them, leading to hyperpolarization.
C. Beta-gamma subunits bind to K+ channels, close them, leading to depolarization.
D. Alpha subunits bind to K+ channels, close them, leading to depolarization.
Answer: D
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The ossicles are
A. three small bones within each ear. B. three of the fourteen facial bones. C. six of the fourteen cranial bones. D. neck bones that articulate with the larynx (voice box).
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A. hemorrhagic anemia. B. polycythemia. C. hemolytic anemia. D. pernicious anemia.
A 9-year-old girl has crashed into her neighbor's brick fence while riding her bike and is brought to the emergency department Chapter 5 Abdomen 235 236 BRS Gross Anatomy with a great deal of abdominal pain. Her radiogram and angiogram show laceration of the superior mesenteric artery immediately distal to the origin of the middle colic artery. If collateral circulation is discounted, which of the following organs may become ischemic?
(A) Descending colon (B) Duodenum (C) Pancreas (D) Ascending colon (E) Transverse colon