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.
Akron borough is an independent local government unit located in Lancaster County. It is run by an elected borough council and an elected mayor. The current Mayor of Akron is John McBeth. The Borough Council is currently run by President John Williamson.