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.
Plymouth County is divided into 13 voting precincts and the following precincts shall be established, listed with their. precinct number, boundary legal description, polling site and polling site location: PRECINCT #1 All of the City of Akron and Portland Township Akron Library. Conference Room. 350 Reed St. Akron, Iowa.