Membranes and cell diffusion: understanding the phenomenon
By: Michael Gotama
Diffusion is the movement of particle from outside to inside through a membrane cell of living thing, vice-versa, the movement of the particle is from an area which has a high concentration gradient to an area which has a low concentration gradient. There are three...
By: Imonikhe Ahimie
Engineering can be defined as the designing, making and putting to use of engines and machinery whilst biology may be defined as the study of the processes that underlie the process that we call life. Bioengineering, incongruous as the term may seem, is a...
Overview of cell biology
By: Tami Port MS
For some reason students rarely seem to get excited about cell biology, a class that is typically required for anyone entering into the field of health care. In the cell biology course that I teach, to help perk up interest in the cellular world, I...
By: Gillian Taber
Our bodies are complicated and endlessly fascinating. It is estimated that there are roughly 10,000 trillion cells in the average human body, although estimates vary hugely and as many as 50 trillion cells has also been given as an average. The cell is one...
Polymerization of nucleotides into nucleic acids
By: Tami Port MS
Nucleic acids are the vital genetic blueprint, messengers and builders of the cellular world. Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are the genetic material of cells. Prior to cell division, a new copy of the DNA genome must be made. And in order for...
Eukaryotic cell endomembrane system
By: Tami Port MS
The cell's endomembrane system consists of the rough and smooth ER, Golgi apparatus, vesicles and plasma membrane, all working together to transport cellular materials.* Eukaryotic Cells * Eukaryotes are organisms composed of cells that have their genetic material encased within a nuclear membrane, the...
Eukaryotic cell structure and function
By: Tami Port MS
Eukaryotic cells possess several critical differences from prokaryotic cells, including a nucleus and other membrane-bound organelles. Here is a summery of some of the defining characteristics of the cell of eukaryotes (plants, animals, fungi and protists).* Two Basic Types of Cells *All cells fall...
An overview of plant cell walls
By: Louis Rosenfeld
What differentiates plant cells from animal cells is that plant cells have a cell wall outside their plasma membrane. The cell wall protects plant cells and imparts stiffness to the plant, allowing it to grow tall. The composition of plant cell walls is mostly cellulose...
The basics of the stages of mitosis
By: Anne Parker
Your body's cells obviously can't live on forever, so they need to reproduce in order to keep your body and mind functioning properly. So how does your body replenish its cells? The answer is this: by an asexual reproduction process that is used by eukaryotic...
Prokaryotic cellular structure and function
By: Jon Clark
Simplicity is supposed to be genius so let's try and keep this simple - particularly for you folks out there who are amateur Biologists with a keen interest in the subject - good for you! Living things are made of cells - there are two...

 

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