Which is NOT typically a step in the cAMP second-messenger system?
A. A first messenger binds to a transmembrane receptor.
B. There is dissociation of G-protein subunits.
C. An activated G-protein subunit phosphorylates cAMP-dependent protein kinase.
D. Adenylyl cyclase converts ATP into cAMP.
E. Active cAMP-dependent protein kinase phosphorylates cell proteins.
C
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A tissue is ________.
A. a group of cells that perform similar functions B. an organ with specific functions C. organs grouped together D. the structural and functional units of the body
Which one of the following would indicate a dentalized [s] production?
a) [ ] b) [s:] c) [ ] d) [ ]
Which of the following statements describes cytosol?
A) The fluid content of the cell. B) The term encompasses all material inside the cell. C) It contains much less protein than the extracellular fluid. D) It includes the intracellular structures known as organelles. E) It contains large amounts of carbohydrates.
The gastroenterologist has just determined that you have a blockage in your jejunum and he will have to perform surgery, making a small incision in the wall to remove the obstruction. Which tunic will be cut first?
A. Adventitia B. Mucosa C. Serosa D. Submucosa E. Tunica muscularis