A class of chemicals called neurotransmitters is important in the transmission of nerve impulses. Neurotransmitters are packaged by the cell into small, membrane-bound sacs called vesicles. Upon receiving a chemical signal, the vesicles move towards the cell membrane and fuse with it, releasing the enclosed neurotransmitters from the terminal end of the nerve cell. Which organelle is most likely responsible for packaging neurotransmitters into a vesicle?
Added by Kent W.
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Step 1: The organelle responsible for packaging neurotransmitters into vesicles is the Golgi apparatus. Show more…
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Peptide neurotransmitters are synthesized by some neurons. Organelles in abundance to manufacture these proteins would include ______________ and __ _____________. These neurotransmitters would need to be shipped to the cell surface. They would leave in vesicles from the ________________ and travel along the _______________ to reach the cell’s surface. Other hormones are derived from cholesterol. This organelle is utilized to make these hormones. _______________. Macrophages (what is a macrophage?) _________________ engulf bacteria by phagocytosis and degrade these bacteria using this organelle ____________________. Other cells, like hepatocytes, (what is a hepatocyte?) _____________ detoxify harmful chemical and utilize a different organelle called a __
Keemin L.
Neurotransmitters open ion channels in the postsynaptic cell causing the cell membrane to depolarize and an excitatory postsynaptic potential (EPSP) is produced in the next nerve cell. Neurotransmitters diffuse across the synaptic cleft and bind to receptors embedded in the postsynaptic cell membrane. Ligand-gated potassium channels open resulting in depolarization of the membrane. Voltage-gated Ca2+ channels open. Ca2+ moves across the cell membrane and into the cytosol. Intracellular Ca2+ binds to vesicles and triggers the release of neurotransmitters into the synaptic cleft via exocytosis. Neurotransmitter molecules are removed from the synaptic cleft. They are either taken up by the presynaptic cell or are degraded by enzymes.
Sri K.
Neurotransmitter is released by _____ at a chemical synapse. a. axon endings b. dendrites c. the cell body d. Schwann cells
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