47. Prozac used for the treatment of depression exerts its effects by keeping th

Question

47. Prozac used for the treatment of depression exerts its effects by keeping the concentration of serotonin elevated in the synapse. These drugs exert their effects by: a. inhibiting reuptake of serotonin by presynaptic terminals b. inhibiting the enzyme that break down serotonin c. inhibiting diffusion of serotonin away from the synaptic cleft d. all of the above 48. An inhibitory postsynaptic potential (IPSP) is not associated with a. hyperpolarization b. a change in sodium ion permeability c. opening of ligand-gated chloride channels d. binding of GABA to its ionotropic receptors 49. Which of the following is incorrect regarding G-protein linked receptors? a. They include monoamine receptors b. Their effects are indirect and prolonged c. They activate second messengers such as Ca and cAMP. d. They are typically ligand-gated ion channels 50. Which of the following does not bind to calcium to regulate muscle or neuronal activity? a troponin b. calmodulin c. tropomyosin d. synaptotagmin

Explanation / Answer

47. Prozac used for the treatment of depression exerts its effects by keeping the concentration of serotonin elevated in the synapse . These drugs exert their effects by:

(d) all of the above.

48. An inhibitory postsynaptic potential (IPSP) is not associated with:

(d) binding of GABA to its ionotropic receptors.

49. Which of the following is incorrect regarding G-protein linked receptors:

(d) they are typically ligand gated ion channels.

50. Which of the following does not bind to calcium to regulate muscle or neuronal activity:

(d) synaptotagmin.

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