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Cellular respiration
Cellular Respiration Definition What is cellular respiration in simple terms? Cellular respiration can be defined simply as... Read More
Glycolysis
What is Glycolysis and Why is it Important? Glycolysis is a metabolic pathway by which the 6-carbon molecule of glucose is... Read More
Spermatogenesis
Spermatogenesis Definition Spermatogenesis is the biological process of producing sperm cells. It occurs in the male gonad... Read More
Interphase
Interphase is the critical period in the eukaryotic cell cycle characterized by a sequence of events like the G1 phase where... Read More
Axon hillock
Axon Hillock Definition What is axon hillock? If you are familiar with the different parts of the neuron, the axon hillock... Read More
Digestion and Absorption of Food
The gastrointestinal (GI) system includes the gastrointestinal tract (mouth, pharynx, esophagus, stomach, small intestine,... Read More
Spermiogenesis
Spermiogenesis Definition Spermiogenesis is the stage of spermatogenesis wherein the spermatids differentiate into mature... Read More
Protein Activity and Cellular Metabolism
Protein Binding Sites The ability of various molecules and ions to bind to specific sites on the protein surface forms the... Read More
Krebs cycle
Krebs cycle, also known as the citric acid cycle or tricarboxylic acid (TCA) cycle, is a fundamental metabolic pathway that... Read More
Nuclear pore complex
Definition noun plural: nuclear pore complexes ˈnu kli ər, pɔː ˈkɒmplɛks A complex of nucleoporins resulting in the... Read More
Depolarization
Depolarization is the removal of polarity by a process or action. It might also be used to describe how such activity leads... Read More
Nuclear pore
Definition noun plural: nuclear pores ˈnu kli ər, pɔː Any of the many perforations on the nucleus as a result of the... Read More
Hypotonic solution
Hypotonic Solution Definition What is a hypotonic solution? It refers to a solution that contains a lower amount of solute... Read More
Turgor pressure
In biology, turgor pressure pertains to the pressure that is exerted by the fluid (e.g. water) against the cell wall. It is... Read More
Plasma membrane
Do all cells have a plasma (or cell) membrane? Yes, all cells have a biological membrane that separates the protoplasm from... Read More
Endomembrane system
Ever wondered how biomolecules are made within the cell and then they are released outside the cell for use by the body?... Read More
Pollution in Freshwater Ecosystems
As with all ecosystems, the existence and operations of human society inevitably have an effect on the way of life in a... Read More
Running Water Freshwater Communities
Running water freshwater communities are also known as lotic communities, lotic meaning running water. Lotic communities are... Read More
Circulation
Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More
Regulation of Organic Metabolism, Growth and Energy Balance
Organic Metabolism Events of Absorptive and Post-absorptive States. The absorptive state is the period during which... Read More
Human Reproduction
Terminology and Concepts Primary reproductive organs are called gonads - testes in the male and ovaries in the female.... Read More
Nucleoporin
Definition noun plural: nucleoporins Any of the family of porins that make up the nuclear pore complex Details Overview... Read More
Neural Control Mechanisms
Nerve cells called neurons generate electric signals that pass from one end of the cell to another and release chemical... Read More
Salmonella typhimurium
Definition A gram-negative pathogenic bacterium associated in gastroenteritis in humans and other... Read More
Cytokinesis
The cell cycle of eukaryotes is a cyclical series of biological events that certain asexual cells go through. The cell cycle... Read More
Polysaccharide
Polysaccharide Definition Biology Definition: A polysaccharide is a carbohydrate formed by long chains of repeating units... Read More
Nuclear envelope
Definition noun plural: nuclear envelopes nu·cle·ar en·ve·lope, ˈn(j)ukliɚ ˈɛn.və.ləʊp The two layered membrane... Read More
Naked virus
Viruses are infectious entities with size ranges between 20 to 400 nanometers. The mammoth-sized virus would be about the... Read More
Biological Cell Defense
Organisms must find a means of defense against antigens such a viruses described on the previous tutorial. If this was not... Read More
Homeostatic Mechanisms and Cellular Communication
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More