Most cat litter is made from bentonite clay
The main storage reservoir for water on earth is ground water
Preganglionic neurons of the sympathetic nervous system are located in the lateral gray horns of segments T1 to L2 of the spinal cord.
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The answer is through facilitated diffusion. It is then called as the transport of substances in a biological membrane from a higher concentration to a lower concentration area though carrier proteins. Hope this is the right answer and would be of help.
