- simple diffusion
- facilitated diffusion
- osmosis

Types of Passive Transport

Passive transport is when compounds move with the concentration gradient. They move from a higher to lower concentration. Passive transport does not require energy to transport molecules.

University of Wisconsin - Madison

Types of Membrane Transport through the Plasma Membrane

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Active transport is when molecules are transported across the plasma membrane against the concentration gradient (from low to high concentration). Active transport requires energy in the form of ATP. 

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