Search Results for: target response
Target response
target response --> operant In conditioning, any behaviour or specific response chosen by the experimenter; its frequency... Read More
Endoplasmic reticulum
Endoplasmic Reticulum Definition The endoplasmic reticulum is a membrane-bound organelle in cells of eukaryotic cells... Read More
Growth and Plant Hormones
Growth All living organisms begin in the same form: as a single cell. That cell will divide and the resulting cells will... 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
Phagocytosis
Phagocytosis Definition Phagocytosis is a basic physiological cellular process wherein a cell ingests a solid particle... Read More
Homeostatic Mechanisms and Cellular Communication
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More
Hormone Production
Reviewed by: Mary Anne Clark, Ph.D.Hormones are chemical messengers produced by glands in the endocrine system.... Read More
Fibroblast
The building block of living things is known as the cell. The cell contributes to many parts and functions of different... 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
Humoral immunity
Let’s get to know where one should place humoral immunity, the topic of today’s discussion!! By the end of the article,... Read More
Endocytosis
Endocytosis Definition What is endocytosis in biology? Endocytosis is a cellular process by which a cell internalizes any... Read More
An introduction to Homeostasis
Researched and Written by Jonjo MinnsSubmitted to biologyonline.com on February 25, 2009.Published in biologyonline.com... 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
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
Gonadotropin
Definition noun, plural: gonadotropins A polypeptide hormone secreted by the anterior pituitary and the placenta, and acts... Read More
Hypertrophy
Hypertrophy Definition Hypertrophy refers to the enlargement or increase in the size of an organ or tissue due to 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
![Hallucinations – a brain glitch – apparently could occur in animals, too. At least, according to a recent experiment on lab mice using optogenetics technique. [Img credit: Rick Harris (Flickr), by CC BY-SA 2.0]](https://www.biologyonline.com/wp-content/uploads/2019/07/hallucination-300x168.jpg)
Hallucination – Are we the only ones “seeing” things or animals hallucinate, too?
Hallucination is defined as perceiving something that seems real but in fact, it is not. Some references take it as a... Read More
Bolus injection
A bolus injection is the act of administering a dose of medication or substance directly into the bloodstream by injection.... Read More
Antigenic variation
Definition noun, plural: antigenic variations (immunology) The changing of surface proteins by an infectious agent to evade... Read More
Glucocorticoid
Definition noun, plural: glucocorticoids Any of a group of corticosteroids involved in carbohydrate metabolism (e.g.... 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
Nervous tissue
Nervous Tissue Definition Nerve cells (or neurons) and their associated cells, such as neuroglia cells, make up nervous... Read More
Melanocyte-stimulating hormone
Definition noun, plural: melanocyte-stimulating hormones A peptide hormone in vertebrates that primarily regulate melanin... Read More
Argipressin
Definition noun, plural: argipressins A vasopressin that has an amino acid sequence:... Read More
Vasopressin
Definition noun, plural: vasopressins An antidiuretic peptide hormone produced by the magnocellular and the parvocellular... Read More
Reservoir host
Reservoir Host Definition A reservoir host is a host that harbors the pathogen and serves as a source of the infective... 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
Second messenger
second messenger (Science: molecular biology) In many hormone sensitive systems the systemic hormone does not enter the... Read More
Nematocyst
All organisms are composed of millions of cells. Many cells serve specific purposes and are specialized to do distinct... Read More
Physiological Homeostasis
In animals such as ourselves, the internal environment of our bodies must have certain conditions within tolerable limits to... Read More
Efferent nerve
Definition noun, plural: efferent nerves The type of nerve that carries nerve impulses away from the central nervous system... Read More
