BÀI 9: TẾ BÀO NHÂN THỰC
UNIT 9: EUKARYOTIC CELL
(Lesson 04)
Teacher: Truong Trieu Trinh

MAIN CONTENT

04

Lesson

III. PLASMA MEMBRANE

IV. STRUCTURES OUTSIDE THE
PLASMA MEMBRANE

1. STRUCTURE
- The principal components of
the plasma membrane are
phospholipid and protein,
plasma membrane is
permeable.
- Carbohydrates - found to be
attached to the lipid or protein
on the extraccellular side of the
membrane, leading to the
formation of glycolipids and
glycoprotein.
- Cholesterol - folded between
the hydrophobic tails of

2. FUNCTION:
- Transport of
substances.
- Information receptor.
- Cell recognition.
- A barrier between the
cytoplasm and the
environment outside the
cell

WORKSHEET NUMBER 4
Match the structural components to the function of the plasma membrane?
Structure

1. The plasma membrane is primarily
composed of phospholipid arranged in a
bilayer, with the hydrophilic head pointing
outwards.
2. Proteins have transmembrane domains
that insert directly into the lipid bilayer.
3. Protein on the membrane (Integral
monotopic protein)
4. Animal cells have many cholesterol
molecules.
5. Protein can be attached to the lipids or
carbohydrate, leading to the formation of
lipoprotein and glycoprotein.

Fuctions

a. Metabolizes with the environment
selectively (semi - permeable)
b. Receive information for cells (tranfer
information).
c. Markers keep the function of
recognizing each other and recognizing
strange cells.
d. Increases plasma membrane stbility.
e. Transport of substances across
membranes.

Answer
1a+e, 2a+e, 3b, 4d, 5c

Improper tissue
transplantation
can cause
rejection because
the glycoprotein
markers on the
plasma membrane
have incompatible
structures.

IV. STUCTURE OUSIDE THE PLASMA MEMBRANE

Read the section IV , page 50 in the textbook,
observe the picture number 9.15

Worksheet number 2
Name of the Picture
structure
Cell wall
Extracellular
matrix

Structure

Function

IV. STUCTURE OUSIDE THE PLASMA MEMBRANE
Cell wall
Structure:
+ Plant cell: composed mainly of
cellulose.
+ Fungal cell: composed mainly of
chitin.
Functions:
+ Provide protection against
mechanical stress and physical shock.
+ Provide definite shape, strength
and rigidity.

IV. STUCTURE OUSIDE THE PLASMA MEMBRANE
Extracellular matrix
Structure:
+ Only found in animal and human cells.
+ Coposed mainly of glycoprotein.
+ Inorganic.
+ Organic substance.

IV. STUCTURE OUSIDE THE PLASMA MEMBRANE
Extracellular matrix
Fuction:
+The extraccellular matrix helps cells
to bind together and regulater a
number of cellular functions, such as
adhesion, migration, proliferation,
and differentiantion. It is formed by
mac romolecules, locally secreted by
resident cells.
+ Help cells receive information.

IV. Structures outside the
plasma membrane
1. Structure and function of cell
wall
- The cell wall covers the
outside of the cell membrane
+ Plant cell: composed mainly
of cellulose
Fungal cell: composed mainly
of Chitin
- The cell wall has the function
of protecting and regulating the
shape of the cell

Fungal
cell:
mainly of Chitin

composed

- The cell wall has the
function of protecting and
regulating the shape of the
cell

2. Structure and function of
the extracellular matrix
- Composed mainly of
glycoproteins bonded to
other inorganic and organic
substances.
- Extracellular matrix helps
animal cells bind together
to form certain tissues.

QUIZ