Figure 1. Types of movement across membranes. Molecules can diffuse across a. membrane down a concentration gradient without the aid of a protein or the input of. energy. Passive and active transport require membrane transport proteins. Channel. proteins carry out passive transport, but carrier proteins can carry out passive or active. transport.
Akron, Iowa. Akron is a city in Plymouth County, Iowa, United States. The population was 1,486 at the 2010 census.
The Washington County Justice Center, opened in 2002, is home to the Washington County and Thirteenth Judicial District Courts, as well as a 180-bed jail. Akron has a low crime rate and is a safe place to live and raise a family or to spend your retirement years.