Nuclear membrane
Nuclear Membrane
The Nuclear Membrane (pronunciation: /ˈnjuː.kli.ər ˈmɛm.breɪn/), also known as the nuclear envelope, is a double-layered structure that encloses the contents of the nucleus in eukaryotic cells.
Etymology
The term "nuclear membrane" is derived from the Latin nucleus meaning "kernel" or "core", and the Greek membrana meaning "skin" or "parchment".
Structure
The nuclear membrane consists of two lipid bilayers—the inner nuclear membrane, and the outer nuclear membrane. The space between these two layers is called the perinuclear space, which is continuous with the endoplasmic reticulum.
Function
The primary function of the nuclear membrane is to protect the DNA inside the nucleus from the metabolic activity of the cytoplasm. It also regulates the passage of molecules between the nucleus and the cytoplasm, maintaining the integrity of the genetic material.
Related Terms
- Nucleus: The central part of a cell that contains the genetic material.
- Inner nuclear membrane: The inner layer of the nuclear membrane.
- Outer nuclear membrane: The outer layer of the nuclear membrane.
- Perinuclear space: The space between the inner and outer nuclear membranes.
- Endoplasmic reticulum: A network of membranous tubules within the cytoplasm of a eukaryotic cell.
- Cytoplasm: The material within a living cell, excluding the nucleus.
- Genetic material: The medium by which instructions are transmitted from one generation of organisms to the next.
External links
- Medical encyclopedia article on Nuclear membrane
- Wikipedia's article - Nuclear membrane
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