Existing landforms are modified by destructive forces, perhaps even eroded away by water, wind, ice, and gravity. Beneath the oceans, volcanic activity forms new seafloor while old seafloor is destroyed at the trenches.
The resting membrane potential is primarily due to the differences in concentrations of potassium ions.
The high concentration of potassium ions in the intracellular fluid and the high permeability of the cell membrane to potassium ions in comparison to other ions are the main causes of the resting potential.
The potential across a certain cell membrane at rest is known as the resting membrane potential. It is largely determined by the potassium concentration gradient across the cell membrane or the ratio of ICF to ECF potassium in neuromuscular tissues (such as neurons, heart muscle, and skeletal muscle).
The passage of potassium, sodium, calcium, and chloride across the membrane causes variations in its permeability, which in turn affects the resting membrane potential (RMP). The differential in potentials between intracellular and extracellular areas, is acquired by the membrane once it has become polarised.
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Answer:
The changes in the sequence of nucleotides present within a promoter is a prime cause of the defected transcriptional regulation, which may eventually result in disease. However, not every modification within the sequence of a promoter influences the regulation of transcription, it relies upon the nature and the location of the genetic defect.
When a mutation results within the sequence of a promoter region it may hamper the usual procedures of gene stimulation by affecting the step by step alignment of the transcription factors at the promoter region. Therefore, as a consequence, a mutation within the sequence of a promoter may result in the enhancement or reduction in the level of mRNA and thus protein.
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Answer:
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Explanation:
The plasma membrane is the organelle that encapsulates the contents of the cell. Apart from encapsulating cell contents, the plasma membrane also plays a vital role in regulating the movement of substances in and out of the cell.
