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.
To learn more about Ion channels click here
brainly.com/question/14264684
#SPJ4
Answer:
RNA world hypothesis.
Explanation:
RNA is present as the genetic material in some viruses only. RNA is produced from the template DNA by the process of transcription and helps in the protein gene expression.
According to RNA world hypothesis, RNA is considered to be the first genetic material as it has the ability to store the genetic material. The oxyribose sugar makes the RNA more reactive than the DNA molecule. The RNA also has the ability to work enzyme known as ribozyme. Hence, RNA has the ability to store the information and acts as catalyst.
Thus, the answer is RNA world hypothesis.
Among eukaryotic cells, there are two processes which comprise protein synthesis from DNA which are transcription and translation. In this statement, this simply states that because of gene regulation, meaning the control of protein outcome results to decrease activity of transcription.
Answer:
more brown mice would survive as the white ones without the snow to camouflage them from predators would get picked off by predators more than the brown ones
Explanation:
