55 results found

Search Results for: loop

Loop

Loop 1. A fold or doubling of a thread, cord, rope, etc, through which another thread, cord, etc, can be passed, or which a... Read More

Feedback mechanism

Feedback Mechanism Definition What is a feedback mechanism? A feedback mechanism is a physiological regulation system in a... Read More

Inoculating loop

Definition noun, plural: inoculating loops A tool usually made of platinum or nichrome wire in which the tip forms a small... Read More

R loop

R loop (Science: molecular biology) A single stranded loop section of dNA formed by the association of a section of ssRNA... Read More

Positive feedback

Positive Feedback Definition Each mechanism of the body like temperature, blood pressure, and levels of specific nutrients... Read More

Transfer ribonucleic acid

Definition noun plural: transfer ribonucleic acids trans•fer ri•bo•nu•cle•ic ac•id, ˈtɹænsfɝ... Read More

Loop of henle

Loop of henle a u-shaped turn in the medullary portion of a renal tubule, with a descending limb from the proximal... Read More

Hairpin loop

Hairpin loop An area where single-stranded dna or rna has folded back on itself and nucleotides from the two separate... Read More

Stem and loop structure

stem and loop structure (Science: molecular biology) The structure of tRNAs is so termed because it has four base paired... Read More

Hyperosmotic

Hyperosmotic Definition What is hyperosmotic? The word hyperosmotic is derived from two Greek words: 'hyper', meaning... Read More

Hyposmotic

Definition adjective 1. Of, relating to, or characterized by having a lower osmotic pressure than a surrounding fluid under... Read More

Autocrine signaling

Autocrine Signaling Definition What is autocrine signaling? Autocrine signaling is a type of cell signaling wherein a cell... 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

Inoculum

Inoculum Definition Inoculation is a term often heard in microbiology, one of the branches of biology that deals with the... Read More

Oxytocin

Definition noun, plural: oxytocins An antidiuretic peptide hormone (chemical formula: C46H66N12O12S2) produced chiefly by... Read More

Sterile

Sterile Definition What does sterile mean? In reproductive biology, we can define sterile as an inability to reproduce or... Read More

Afferent Nerve

Afferent Nerve Definition The word ‘aferent’ means "steering or conducting something towards a destination". The... Read More

Chromatin

Chromatin Definition What is chromatin in a cell? Chromatin is a complex of nucleic acids (e.g. DNA or RNA) and proteins... Read More

Kidneys and Regulation of Water and Inorganic Ions

Renal Functions Kidneys remove/add substances from/to the plasma. Regulate water concentration, inorganic ion... Read More

Principles of Hormonal Control Systems

Hormones are chemical messengers that enter the blood directly upon their secretion from endocrine glands. A single gland or... Read More

Chloroplast DNA

Definition noun plural: chloroplast DNAs DNA in the chloroplast that carries the code for proteins and RNAs essential to... Read More

Frog

Frog 1. (Science: zoology) An amphibious animal of the genus rana and related genera, of many species. Frogs swim rapidly,... Read More

Renal medulla

Definition noun, plural: renal medullae or renal medullas The inner region of the kidney that is arranged into renal... Read More

Tubule

Definition noun, plural: tubules A small tube-like or fistular structure; a hollow cylindrical anatomical structure in the... Read More

Inoculation

Inoculation Definition In Immunology, inoculation is defined as the process of introducing an antigenic substance or... Read More

Nucleosome

Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More

Negative feedback

Definition noun (1) A feedback in which the system responds to the perturbation in the opposite direction as the... Read More

Lymph capillary

Definition noun, plural: lymphatic capillaries (anatomy) A minute, thin-walled vessel of the lymphatic system that is... Read More

Synergistic effect

Synergistic Effects Definition In biology, synergistic effects are the effects when chemical substances or biological... Read More

Deoxythymidine

Definition noun plural: deoxythymidines A pyrimidine nucleoside that has thymine attached to the pentose sugar... Read More

Chemical Composition of the Body

In order to fully understand the mechanisms of human physiology, it is important to have an understanding of the chemical... Read More

Net primary productivity

In order to keep the biosphere running, different organisms play different roles and functions. Some help in oxygen... Read More

Light-dependent reaction

Many organisms, such as green plants, convert light energy into chemical energy through the mechanism of photosynthesis. In... Read More

Ultrafiltration

Definition noun (1) A high pressure filtration through a semipermeable membrane in which colloidal particles are retained... Read More

Aromatic compound

Aromatic compound --> cyclic compound Any compound in which the constituent atoms, or any part of them, form a ring. Used... Read More

Nephron

Definition noun, plural: nephrons The structural and functional unit of the kidney, i.e. a structure comprised of a set of... Read More

Procaryote

Definition noun, plural: procaryotes Any of the group of organisms primarily characterized by the lack of true nucleus and... Read More

Structure

Definition noun, plural: structures (1) (biology) An arrangement or organization of parts to form an organ, system, or... Read More

Tree

“The biological diversity is plenty if you look around yourself a little closely; with an eye for life!” … People... Read More

Chromosome

Chromosomes Definition Chromosomes are the thread-like structure present in the nucleus of plant and animal cells.... Read More