The movement of ions against the concentration gradient is typically accomplished through Active transport. Active transport processes use energy (usually ATP) to pump ions or molecules across a cell membrane against their concentration gradient, from areas of lower concentration to areas of higher concentration. This process is essential for maintaining ion gradients and performing various physiological functions.
So, the correct option is (A): Active transport
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
The current passing through the battery in the given circuit, is:
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
Read More: Fundamental Unit of Life: Cell
The different parts of a cell and their functions are as follows: