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.
One of the best schools is King Elementary School, which is rated 10. King Elementary School has 372 students. The public schools in Akron belong to Akron City School District. Edge Academy The is nearby and has lesser ratings than Akron City School District. Nearby Akros Middle School scores higher, with a rating of 6.