Which tissues contain both cholinergic and adrenergic receptors, and how does this relate to their autonomic control?
What will be an ideal response?
A list is provided in Figure 11.5 in the chapter. For most target organs listed, acetylcholine and (nor)epinephrine have opposite effects on the target organ.
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When magnesium loses electrons to become an ion, what does it become?
A. A covalent molecule B. An anion C. A free radical D. A new element E. A cation
Pacemaker activity refers to spontaneous depolarizations resulting from
a. shifts in passive ionic fluxes accompanying b. cyclical changes in Na+-K+ pump activity c. automatic changes in channel permeability d. both a and b e. both a and c
The pyloric gland area of the stomach antrum secretes
a. histamine b. gastrin c. intrinsic factor d. both a and b e. both a and c
Which of these lists contains only trace elements?
A) sulfur, chlorine, oxygen B) selenium, hydrogen, calcium C) boron, oxygen, carbon D) silicon, fluorine, tin E) cobalt, calcium, sodium