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Muscular System, Skeletal Muscle
The junction between the terminal of a motor neuron and a muscle fiber is called the neuromuscular junction. It is simply one kind of synapse. (The neuromuscular junc...

Cellular Metabolism, Enzimes
Enzymes allow many chemical reactions to occur within the homeostasis constraints of a living system. Enzymes function as organic catalysts. A catalyst is a chemical invo...

Cellular Metabolism, Pathways & Feedback

The sum of all chemical changes that take place in a cell through which energy and basic components are provided for essential processes, including the ...

Diffusion is the spontaneous net movement of particles from an area of high concentration to an area of low concentration in a given volume of fluid (either liquid or gas) down the concentration gradi...

Osmosis is the diffusion of water down its concentration gradient. Normally one thinks of water as the solvent, and focuses on the concentration of the solutes, but water itself has a concentration i...

Cell Membrane, Active Transport

Cell Membrane, Exocitosis & Endocitosis

Protein Synthesis, DNA Structure

Protein Synthesis, DNA Structure

Nucleotides are joined together in DNA and RNA by phosphate ester bonds between the phosphate component of one nucleotide and the sugar component of the next nucleo...

Protein Synthesis, DNA Replication

DNA replication is the process of copying a double-stranded DNA molecule to form two double-stranded molecules.[1][2] The process of DNA replication is a fundamen...

Protein Synthesis, Transcription

Transcription - Protein synthesis starts in the nucleus, where the DNA is held. DNA structure is two chains of sugars and phosphates joined by pairs of nucleic acid...

Protein Synthesis, Translation
Translation - the process of converting the mRNA codon sequences into an amino acid polypeptide chain.

1. Initiation - A ribosome attatches to the mRNA and starts to...

Protein Synthesis, Translation
Translation - the process of converting the mRNA codon sequences into an amino acid polypeptide chain.

1. Initiation - A ribosome attatches to the mRNA and starts to...

Protein Synthesis, Translation
Translation - the process of converting the mRNA codon sequences into an amino acid polypeptide chain.

1. Initiation - A ribosome attatches to the mRNA and starts to...

Cell Division, Mitosis
Mitosis is nuclear division plus cytokinesis, and produces two identical daughter cells during prophase, prometaphase, metaphase, anaphase, and telophase. Interphase is often i...

Cell Division, Meiosis
Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced. Meiosis involves a reduction in the amount of genetic material.

Meiosis comprises two...

ADN / DNA
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA. Most DNA is located in the cell nu...