Ion channels are membrane proteins that produce pores in the membrane and permit ions to pass through the pore. Two main types of ion channels resent on neurons are as follows: Ligand gated and voltage gates ion channels.
Ligand-gated ion channels open or close in response to the binding of ligands to the channel, whereas voltage-gated ion channels, open or close in response to the voltage gradient across the plasma membrane.
Ion channels in neurons are gated pores whose opening and closure are often controlled by ligands or voltage.
Dendrites and the cell body of the neuron consist of chemically-gated channels and for the most part, Voltage-gated channels are present at the nodes of Ranvier in myelinated axons, in unmyelinated axons, and on the axon hillock.
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The answer is A. They contain a large amount of gas and dust
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Answer:
The importance of early childhood experiences for brain development. Children are born ready to learn, and have many skills to learn over many years. ... Exposure to stress and trauma can have long-term negative consequences for the child's brain, whereas talking, reading, and playing can stimulate brain growth.
Unused brain synapses disappear Research also shows that children born into cultures where early stimulation is considered important, develop earlier than Western children do," van der Meer says. She adds that the brains of young children are very malleable, and can therefore adapt to what is happening around them.
Stimulation in early childhood can alleviate adverse effects of poverty.
And early brain development has a lasting impact on a child’s ability to learn and succeed in school and life. The quality of a child’s experiences in the first few years of life – positive or negative – helps shape how their brain develops.
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