It's important that cell membranes establish and maintain their internal environments through selective permeability.(1:40) There are three main types of active transport - membrane pumps,(2:45) endocytosis (5:37) and exocytosis.(6:30)The Question of the Day asks (8:10) How is a cotransporter classified that moves molecules in opposite directions?Thank you for listening to The APsolute RecAP: Biology Edition!(AP is a registered trademark of the College Board and is not affiliated with The APsolute RecAP. Copyright 2020 - The APsolute RecAP, LLC. All rights reserved.)Website:www.theapsoluterecap.comEMAIL:TheAPsoluteRecAP@gmail.comFollow Us:INSTAGRAMTWITTERFACEBOOKYOUTUBE