The movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration. The energy needed for active transport is supplied by ATP.
At the second tier, you can expect to pay $60 - $70 per linear foot. You'll have some concerns about chipping and denting, but less so than at the lower tier. At the highest tier, soapstone bathroom countertops are priced at $70 - $80 per linear foot, and their durability should not be an issue. See also: Bathroom Remodeling Ideas, Options and Solutions.
Carver says his entry-level granite countertops cost $50 to $55 per square foot, while basic quartz countertops typically cost $75 to $85 per square foot. Granite countertops aren't limited to beige. A blue granite countertop matches the home's decor. (Photo by Jessican Anderson) Hansen says his basic granite countertops start around $60 to $65 per square foot, while entry-level quartz runs in the high $70 range. He says homeowners need to know the origin of the granite they plan to purchase.