240 results found

Search Results for: regulation

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

Homeostasis of Organism Water Regulation

Osmoregulation Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the... Read More

Gene Regulation in Eukaryotes

Reviewed by: Mary Anne Clark, Ph.D. Eukaryotic Gene Structure In prokaryotes the DNA is located in the... Read More

Regulation of Biological Systems

Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population... 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

Temperature Regulation in Animals

Control of Temperature in Homeotherms Animals capable of temperature regulation within a given range are deemed homeotherms... Read More

Homeostasis

Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More

Feedback mechanism

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

Up-regulation physiology

up-regulation (physiology) process that increases ligand/receptor interactions due to an increase in the number of available... Read More

Feedback regulation

Feedback regulation (Science: physiology) control mechanism that uses the consequences of a process to regulate the rate at... Read More

Down-regulation

Down-regulation (Science: physiology) development of a refractory or tolerant state consequent upon repeated administration... Read More

Regulation

Regulation 1. (Science: biology) The adaption of form or behaviour of an organism to changed conditions. 2. (Science:... Read More

Density dependent limiting factor

What Is A Density-Dependent Limiting Factor? Density-dependent limiting factors are limiting factors, which, depending on... Read More

Enzyme regulation

Enzyme regulation (Science: biochemistry) control of the rate of a reaction catalyzed by an enzyme by some effector (e.g.,... Read More

Lipogenesis

Lipogenesis Definition Lipogenesis is the process of producing lipid or fat to store biochemical energy for later metabolic... Read More

Flagellum

Flagellum Definition Flagellum is a slender, hair-like structure composed of a complex arrangement of multiple proteins,... Read More

Smooth endoplasmic reticulum

Smooth Endoplasmic Reticulum Definition Smooth endoplasmic reticulum (sER) is part of or a region in the endoplasmic... Read More

Centrosome

Centrosome Definition What is a centrosome? The centrosome is considered to be the main microtubule-organizing... Read More

Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... 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

Integumentary system

Integumentary System Definition The integumentary system is the outermost layer of the body. The animal body, in... Read More

Plant Water Regulation

A plant requires water as an essential ingredient of photolysis, the photochemical stage of photosynthesis where water is... Read More

Endoplasmic reticulum

Endoplasmic Reticulum Definition The endoplasmic reticulum is a membrane-bound organelle in cells of eukaryotic cells... Read More

Circulation

Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More

Animal Water Regulation

Homeostatic control, a set environment, and how evolution and natural selection drives a species to adapt to its environment... Read More

Osmoregulation

Definition noun The process of regulating water potential in order to keep fluid and electrolyte balance within a cell or... Read More

Y chromosome

Y chromosome Definition The Y chromosome constitutes one member of the pair of sex chromosomes within an organism, a common... Read More

Phosphorylation

Phosphorylation Definition We can define phosphorylation as a biochemical process in which a phosphate molecule is added to... Read More

Population Regulation in an Ecosystem

Darwin focused some of this work in regards to the population size of a species, and what factors may affect them. He... Read More

Sugar Homeostasis

Blood Sugar Regulation As described in Cell Biology tutorials, the body requires volumes of glucose in order to create ATP.... Read More

Characteristic

Characteristics Definition We can define characteristics as qualities or features that describe the distinctive nature or... Read More

Cytokinin

Plants require growth hormones for their regulated growth. Plant growth hormones or regulators (PGRs) are small organic... Read More

Density dependent factor

Density-dependent factors are the limiting factors of an ecosystem that regulate population growth in a density-dependent... 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

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

Hypothalamus

Definition noun, plural: hypothalami A small region of the forebrain comprised of several small nuclei, located between the... Read More

Cell adhesion

Cell Adhesion Definition Cell adhesion is the process in which a cell uses a specialized complex of proteins to get... Read More

Mitochondrion

Mitochondrion Definition What are mitochondria? The term “mitochondrion” comes from the two words of the Greek... Read More

Epidermis

Epidermis Definition What is the epidermis? We can define the epidermis as one or more layers of cells forming the tough... Read More