The nuclear membrane, also known as the nuclear envelope, is a double lipid bilayer that surrounds the genetic material and nucleolus in eukaryotic cells. It consists of an inner and outer nuclear membrane, with the space between called the perinuclear space. The nuclear membrane functions to compartmentalize the nuclear material, maintain the shape and stability of the nucleus, regulate the transport of substances into and out of the nucleus through nuclear pores, and facilitate communication between the nucleus and the cell.

2. -also known as the nuclear envelope
-is the double lipid bilayer membrane
which surrounds the genetic material
and nucleolus in eukaryotic cells
-consists of two lipid bilayers—the
inner nuclear membrane, and the
outer nuclear membrane.
Nuclear Membrane

3.  The space between the membranes is called the perinuclear
space, a region contiguous with the lumen (inside) of the
endoplasmic reticulum.
Outer Nuclear membrane
The outer nuclear membrane is also contiguous with the
endoplasmic reticulum. While it is physically linked, the outer
nuclear membrane contains various proteins found in far higher
concentrations than the endoplasmic reticulum.
Inner Nuclear membrane
The inner nuclear membrane encloses the nucleoplasm. It is
connected to the outer membrane by nuclear pores which
penetrate the membranes. While the two membranes and the
endoplasmic reticulum are linked, proteins embedded in the
membranes tend to stay put rather than dispersing across the
continuum.

4. The Functions of Nuclear Membrane
 Compartmentalizing. The nuclear membrane
is vital in separating the nuclear material from
the cellular material. Compartmentalization is
vital in eukaryote cells to prevent the free
mixture of cellular material with the nuclear
material.
Shape and stability of the nucleus. With the
help of the lamina inside the nucleus, the
double membrane helps keep the nucleus from
collapsing and interfering with the functions of
the nucleus.

5. Regulation of substances in and out of the nucleus.
Proper function of the nucleus requires the regulation of
what proteins and enzymes are allowed in and out of
the nucleus. The control of these passages is carried out
by the thousands of nuclear pores. Each pore has its
own regulatory proteins that only allow specific
substances to pass in or out of the nucleus.
Communication. The nuclear membrane and nuclear
pores regulate the chemical communication between the
nucleus and the rest of the cell. This communication is
vital to the overall welfare and function of the cell.
The Functions of Nuclear Membrane

6. Questions:
1. What are the two lipid
bilayers?
2. What is the peninuclear space?
3.-4. Give 2 functions of the
nuclear membrane.
5. Other name for nuclear
membrane.

7. Answers:
1. Inner Nuclear Membrane and Outer Nuclear
Membrane
2. Peninuclear space is the space between the
membranes or
a region contiguous with the lumen of the
endoplasmic reticulum.
3.-4. Compartmentalizing, Shape and stability
of the nucleus, Regulation of substances in and
out of the nucleus or Communication
5. Nuclear Envelope

8. By: Alyza Joyce A. Rotas
VIII-Mendel
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