26 results found

Search Results for: impermeable

Arthropod

Arthropod Definition What is an arthropod? An arthropod is an invertebrate living organism characterized by the presence of... 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

Cork cambium

Cork Cambium Definition Cork cambium is a secondary meristematic tissue that has a pivotal role in secondary growth in... Read More

Tight junction

What are tight junctions? Tight junctions are the intercellular barrier between two neighboring endothelial and epithelial... Read More

Impermeability

Definition noun The state or quality of a substance being impermeable or impassable, especially to fluids. Supplement Word... Read More

Tissue

Tissue Definition What is tissue in the body? The body tissue is an aggregation of cells that function together and have a... Read More

Nucleus

In cell biology, the nucleus is the large, membrane-bounded organelle that contains the genetic material in the form of... Read More

Erythrocyte

Erythrocyte Definition Erythrocytes (red blood cells or RBCs) are the myeloid series of specialized cells that play an... 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

Electroporation

Definition noun, plural: electroporations A non-chemical method that transfers the genetic material into the recipient cell... 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

Hyposmotic

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

Plasmodesmata

Plasmodesmata (singular, plasmodesma) microscopic channels of plants facilitating transport and communication between... Read More

Hyperosmotic

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

Isosmotic

Definition adjective (1) (used of solutions) Of or having the same or equal osmotic pressure. (2) A condition in which the... 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

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

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

Permeable

Definition adjective Capable of being permeated or passed through, used especially of substances where fluids can penetrate... Read More

Cell wall

The cell is the structural, functional, and biological unit of all organisms. It is a membrane-bound structure containing... 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

Keratin

Keratin is a fibrous protein naturally present in hair, skin, and nails. In hair care, it serves as a protective and... Read More

Bark

Definition noun, plural: barks (botany) The outermost covering of stems and roots of woody plants (especially trees), and is... Read More

Movement of Molecules Across Cell Membranes

Diffusion Diffusion is essentially the movement of molecules from a region of higher concentration to a region of lower... Read More

Permeability

Permeability Definition What is permeability? In earth science, its definition is this: "the ability of any material such... Read More