142 results found

Search Results for: target

Target cell

target cell An erythrocyte in target cell anaemia, with a dark centre surrounded by a light band that again is encircled by... Read More

Target cells

target cell An erythrocyte in target cell anaemia, with a dark centre surrounded by a light band that again is encircled by... Read More

Target response

target response --> operant In conditioning, any behaviour or specific response chosen by the experimenter; its frequency... Read More

Target organ

target organ A tissue or organ upon which a hormone exerts its action; generally, a tissue or organ with appropriate... Read More

Target

target 1. An object fixed as goal or point of examination. 2. In the ophthalmometer, the mire. Synonym: target organ. 4.... Read More

DNA and the chromosome – varied targets for chemotherapy

Review DNA and the chromosome – varied targets for chemotherapy Stephanie M Nelson, Lynnette R Ferguson and William A... Read More

Axon terminal

An axon terminal is any of the button-like endings of axons through which axons make synaptic contacts with other nerve... Read More

CRISPR caused gene damage? Rise and pitfall of the gene-editor

CRISPR as a gene-editing tool made a prodigious leap forward in science. In 2015, it was heralded as Science’s 2015... 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

Hormone Production

Reviewed by: Mary Anne Clark, Ph.D. Hormones are chemical messengers produced by glands in the endocrine system.... 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

Cell signaling

Definition noun The process of communication occurring between the cells and within the cell Supplement Cell signaling is... Read More

Endocytosis

Endocytosis Definition What is endocytosis in biology? Endocytosis is a cellular process by which a cell internalizes any... Read More

Gene gun

Definition noun A method of transferring large molecules such as DNA into the cell by coupling the DNA to a nanoparticle of... Read More

Gonadotropin

Definition noun, plural: gonadotropins A polypeptide hormone secreted by the anterior pituitary and the placenta, and acts... Read More

An introduction to Homeostasis

Researched and Written by Jonjo Minns Submitted to biologyonline.com on February 25, 2009. Published in biologyonline.com... Read More

Cytotoxic T cell

Definition noun, plural: cytotoxic T cells A T cell responsible for inducing death to target cells (e.g. infected somatic... Read More

Expression vector

Definition noun, plural: expression vectors A plasmid containing the required regulatory sequences specifically used for the... Read More

Ganglia

Ganglia Definition What are ganglia? To simply define ganglia in biology, it is the structure of an oval shape that... Read More

Steroid hormone

Definition noun, plural: steroid hormones A type of steroid that acts as a hormone, and that which is exemplified by sex... Read More

Homeostatic Mechanisms and Cellular Communication

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

The Human Nervous System

The nervous system is essentially a biological information highway, and is responsible for controlling all the biological... Read More

Antigen

Antigen Definition What is an antigen? A simple definition is that an antigen refers to any substance that triggers an... Read More

Mexican hat cell

Mexican hat cell --> target cell An erythrocyte in target cell anaemia, with a dark centre surrounded by a light band... Read More

Oxytocin

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

K cell

Definition noun An abbreviated form for killer cell, a form of T lymphocyte that kills target cell through... Read More

Vasopressin

Definition noun, plural: vasopressins An antidiuretic peptide hormone produced by the magnocellular and the parvocellular... Read More

Efferent neuron

Definition noun, plural: efferent neurons A neuron with an axon that carries nerve impulses peripherally, and innervates... Read More

Estradiol

Definition noun, plural: estradiol An estrogenic hormone with a chemical formula of C18H24O2; a potent estrogen; a major... Read More

Oligonucleotide

Definition noun plural: mononucleotides ol·i·go·nu·cle·o·tide, ŏl′ĭ-gō-no͞o′klē-ə-tīd A short polymer... Read More

Second messenger

second messenger (Science: molecular biology) In many hormone sensitive systems the systemic hormone does not enter the... Read More

Melanocyte-stimulating hormone

Definition noun, plural: melanocyte-stimulating hormones A peptide hormone in vertebrates that primarily regulate melanin... Read More

Viral vector

Definition noun, plural: viral vectors A virus vector that transmits the modified genetic material of the into the target... Read More

Phagosome

Definition noun plural: phagosomes phag·o·some, ˈfæg əˌsoʊm (cell biology) A vesicle that forms by pinching off... Read More

Hormone

Definition noun, plural: hormones (physiology) Any of the substances produced and secreted by an endocrine gland, and then... Read More

A new wrinkle in evolution — Man-made proteins

Nature, through the trial and error of evolution, has discovered a vast diversity of life from what can only presumed to... Read More

Pattern

pattern 1. Anything proposed for imitation; an archetype; an exemplar; that which is to be, or is worthy to be, copied or... Read More

CRISPR DIY – biohacking genes at home

Have you ever thought of changing yourself for the better -- genetically-speaking? Lately, CRISPR company has been selling a... Read More

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

Argipressin

Definition noun, plural: argipressins A vasopressin that has an amino acid sequence:... Read More