The major difference between D1 and D2 dopamine receptor subtypes is that one Group of answer choices is ionotropic and the other is metabotropic. is ionotropic and the other stimulates adenylyl cyclase and cAMP inhibits and one stimulates IP3 inhibits and one stimulates adenylyl cyclase and cAMP is ionotropic and the other inhibits adenylyl cyclase and cAMP
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There are two main subtypes of dopamine receptors: D1 and D2. Show more…
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2. What is one main difference between ionotropic and metabotropic receptors? A. Metabotropic receptors form ion channel pores for direct movement of ions, whereas ionotropic receptors don't. B. Only metabotropic receptors can be activated by neurotransmitters. C. Ionotropic receptors form ion channel pores for direct movement of ions, whereas metabotropic receptors don't. D. Activators of ionotropic receptors are called agonists, whereas activators of metabotropic receptors are called antagonists. 3. Which of the following statements about loading synaptic vesicles with neurotransmitter (NT) molecules is INCORRECT? A. The loading of synaptic vesicles with NT is facilitated by a proton gradient. B. The inside of the synaptic vesicles is acidified prior to loading. C. Loading of NT is preceded by the activity of the vacuolar hydrogen ATPase. D. The vesicle sodium/potassium ATPase establishes a sodium gradient needed to load NT into vesicles. 4. Which statement about exocytosis of neurotransmitter-filled synaptic vesicles is INCORRECT? A. Vesicles have to be docked and primed before they can be exocytosed. B. SNARE proteins interact in order for fusion to take place. C. Synaptotagmin is a T-SNARE protein, which acts as a calcium sensor. D. Calcium enters the terminal in close proximity to vesicles' location.
Adi S.
Which of the following is TRUE about ionotropic vs metabotropic receptors? A. Metabotropic receptors are ion channels. B. When ionotropic receptors are activated they can cause an immediate change in the voltage across the membrane of the receptor neuron. C. Ionotropic receptors are coupled to G proteins and thus indirectly to ion channels. D. Metabotropic receptors activate second messenger systems and as such their effect is very short-lived (immediate).
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