Basics
Endocytosis
Endocytosis is a type of active transport that moves particles, such as large molecules, parts of cells, and…
July 12, 2021 · Rajil TLBasics
Basics
Electrochemical Gradient
We have discussed simple concentration gradients—differential concentrations of a substance across a space or a membrane—but in living…
July 12, 2021 · Rajil TLBasics
Active Transport
Active transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (ATP).…
July 12, 2021 · Rajil TLBasics
The Cell Membrane
A cell’s plasma membrane defines the boundary of the cell and determines the nature of its contact with…
July 12, 2021 · Rajil TL
Basics
Animal Cells versus Plant Cells
Despite their fundamental similarities, there are some striking differences between animal and plant cells Animal cells have centrioles,…
July 12, 2021 · Rajil TLBasics
Ribosomes, Mitochondria & Peroxisomes
Ribosomes Ribosomes are the cellular structures responsible for protein synthesis. When viewed through an electron microscope, free ribosomes appear…
July 12, 2021 · Rajil TLBasics
Vesicles and Vacuoles
Vesicles and vacuoles are membrane-bound sacs that function in storage and transport. Vacuoles are somewhat larger than vesicles,…
July 12, 2021 · Rajil TLBasics
Lysosomes
In animal cells, the lysosomes are the cell’s “garbage disposal.” Digestive enzymes within the lysosomes aid the breakdown of proteins,…
July 12, 2021 · Rajil TLBasics
The Endomembrane System
The endomembrane system (endo = within) is a group of membranes and organelles in eukaryotic cells that work together to…
July 12, 2021 · Rajil TL
Basics
Flagella and Cilia
Flagella (singular = flagellum) are long, hair-like structures that extend from the plasma membrane and are used to…
July 12, 2021 · Rajil TL