Active transport is the movement of molecules across a membrane from a region of their lower concentration to a region of their higher concentrationâin the direction against the concentration gradient. Active transport requires cellular energy to achieve this movement. There are two types of active transport â primary active transport that uses ATP, and secondary active transport that uses an electrochemical gradient. An example of active transport in human physiology is the uptake of ...
Cooperation is a word that refers to a process of working in unison, to achieve an objective rather than to work independently to compete with each other. We all know about cooperatives where people pool together resources to have a working system.
Definition of freethinker for English Language Learners : a person who forms his or her own opinions about important subjects (such as religion and politics) instead of accepting what other people say