<span>If some of the synapses onto a cell have been highly active and others have not, only the active ones become strengthened. This is known as the property of specificity.
Synapse allows the neuron to pass electrical and chemical signals to other neuron. A specificity of synaptic connection between neurons and target cells is known as synaptic specificity.</span>
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Answer:
channels and chain-like structures
Explanation:
The plasma membrane contains channels that favor the transport of materials from both sides, i.e., from the intracellular medium to the extracellular environment. Membrane channels are a class of proteins that enable the passive transport of ions and chemical compounds by using the electrochemical gradient in both sides of the membrane. For example, channel proteins in the cell membrane known as aquaporins enable the transport of water across the cell membrane much more rapidly than by diffusion across this barrier.