The Inner Life Of The Cell. The Human Cell Animation. XVIVO

In 2006, Harvard University teamed up with XVIVO to develop an animation that would take their cellular biology students on a journey through the microscopic world of a cell. The Inner Life of the Cell follows a white blood cell’s movement along the endothelium and its response to an external stimulus — a process known as leukocyte extravasation. This widely-acclaimed piece is the first in a series of animations XVIVO has created for Harvard’s BioVisions. The second installment, titled Powering the Cell: Mitochondria, follows the mechanism of ATP production along the inner mitochondrial membrane. In 2013, we released The Inner Life of the Cell: Protein Packing, which illustrates the crowded molecular environment present in cells. Narrated versions are available on the BioVisions website.

Organelles made relevant Cell Size and Scale Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny. Smaller cells are easily visible under a light microscope. It's even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts. To see anything smaller than 500 nm, you will need an electron microscope. Adenine The label on the nucleotide is not quite accurate. How can an X chromosome be nearly as big as the head of the sperm cell? No, this isn't a mistake. The X chromosome is shown here in a condensed state, as it would appear in a cell that's going through mitosis. A chromosome is made up of genetic material (one long piece of DNA) wrapped around structural support proteins (histones). Carbon

How Big? Interactive ^ HowBig? Overview © cellsalive.com Active and Passive Transport Active and passive transport are biological processes that move oxygen, water and nutrients into cells and remove waste products. Active transport requires chemical energy because it is the movement of biochemicals from areas of lower concentration to areas of higher concentration. On the other hand, passive trasport moves biochemicals from areas of high concentration to areas of low concentration; so it does not require energy. Process There are two types of active transport: primary and secondary. Example of primary active transport, where energy from hydrolysis of ATP is directly coupled to the movement of a specific substance across a membrane independent of any other species. There are four main types of passive transport: osmosis, diffusion, facilitated diffusion and filtration. Three different mechanisms for passive transport in bilayer membranes. Video explaining the differences Here's a good video explaining the process of active and passive transport: Examples References