Examlex
E-readers were introduced a few years ago with great success. Additional companies have entered the market, and sales have continued steadily. E-readers are an example of a product in the ______ stage of the product life cycle.
Charybdotoxin
A toxin isolated from scorpion venom, which blocks potassium channels in cells, affecting the cellular electrical activity.
Channels
Pathways through which substances can pass in and out of cells or across cell membranes, often specific to certain types of ions or molecules.
Substance P
A peptide neurotransmitter released by certain sensory neurons in pain pathways; signals the central nervous system regarding pain; also stimulates other structures, including smooth muscle in the digestive tract.
Neurotransmitter
Chemical substances released from neurons that transmit signals across a chemical synapse to affect other neurons, muscle cells, or gland cells.
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