Examlex
What do you consider to be the major events, trends, and turning points in the history of Christianity? Explain the significance of each.
Neurofibrils
Fine, thread-like structures within nerve cells that provide support and conduct electrical signals throughout the neuron.
Chemical Messenger
A substance, such as a hormone or neurotransmitter, that transmits signals from one cell to another.
Neurotransmitter
Chemicals released by neurons to transmit signals across a synapse to another neuron, muscle cell, or gland.
Calcium Channel
Calcium channels are protein-based channels within cell membranes that selectively allow calcium ions to move into or out of a cell, playing critical roles in various physiological processes including muscle contraction, neurotransmission, and gene expression.
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