According to the research, the primary purpose of membrane channels is to circulate ions, and of membrane pumps is to maintain differences in ionic concentration.
<h3>What are membrane channels and pumps?</h3>
They are pores in the cell membrane through which ions circulate for muscle contraction or membrane potential changes that may depend on a ligand or voltage, depending on whether their opening is determined by the binding of a ligand or by changes of voltage.
In this sense, membrane pumps is the mechanism of active ion transport, consuming energy across a membrane against an electromechanical gradient to maintain differences in ion concentration between the intracellular and extracellular space.
Therefore, we can conclude that according to the research, the primary purpose of membrane channels is to circulate ions, and of membrane pumps is to maintain differences in ionic concentration.
Learn more about membrane channels and pumps here: brainly.com/question/11090806
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The correct answer is:
A- a policy favoring native-born Americans over immigrants
Explanation:
Nativism is the executive position of processing status for several organized inhabitants of a nation as contrasted to requirements of newcomers or aliens. It is characterized by opposition to immigration based on fears that the emigrants will deteriorate or spoil surviving cultural importance.
Aerobic Respiration
<span>Cellular respiration involves a series of chemical reactions. The enzymes increase the rate of the reactions. So option “B” is the correct option as far as the given question is concerned. The reactions that are catalysed by enzymes actually helps the organism to grow, respond to various changes in the environment, reproduce and continue maintaining their own structures. Cellular respiration is also considered a part of the metabolism process. This process actually helps in carrying the oxygen through the blood. </span>
The answer is Active transport
