Which receptor type mediates the slow phase of synaptic transmission in autonomic ganglia?
AMuscarinic (M3)
BMuscarinic (M2)
CMuscarinic (M1)
DNicotinic (N2)
A 23-year-old woman presents to the emergency department with acute onset of shortness of breath, wheezing, and chest tightness. This is her 4th visit for these symptoms in the last 5 years. She tells you she recently ran out of her normal "controller" medication. Concerned for an asthma exacerbation, you begin therapy with a short-acting beta2-agonist. What is the expected cellular response to your therapy?
AGs protein coupled receptor activates adenylyl cyclase and increases intracellular cAMP
BGq protein coupled receptor activates phospholipase C and increases intracellular calcium
CGq protein coupled receptor activates adenylyl cyclase and increases intracellular cAMP
DGs protein coupled receptor activates phospholipase C and increases intracellular calcium
EGi protein coupled receptor inhibits adenylyl cyclase and decreases cAMP
An investigator is studying a drug that acts on a G protein-coupled receptor in the pituitary gland. Binding of the drug to this receptor leads to increased production of inositol triphosphate (IP3) in the basophilic cells of the anterior pituitary. Administration of this drug every 90 minutes is most likely to be beneficial in the treatment of which of the following conditions?
AProstate cancer
BVariceal bleeding
CCentral diabetes insipidus
DAnovulatory infertility
EHyperkalemia
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