03:03Concentration gradients | Membranes and transport | Biology | Khan AcademyKhan Academy669views2rank
01:59Concentration Gradients VS Electrochemical Gradients | With Examples2 Minute Classroom1064views1rank
Textbook QuestionA substance moving across a membrane against a concentration gradient is moving by . a. passive transport; b. osmosis; c. facilitated diffusion; d. active transport; e. diffusion893views