cell membrane and its functions for MLT students

1. MODULE 1
TOPIC
CELL MEMBRANE & IT’S FUNCTIONS

2. Course outcomes
On completion of this lecture the student will be
able to:
• Demonstrate cell & Cell organelles , Tissues, &
Organ systems of Human body

3. Learning outcomes
• On completion of this lecture, the student will
be able to:

4. Contents
1. Introduction to cell membrane
2. Models of cell membrane
3. Stucture of cell membrane
4. Composition of cell cell membrane
5. Functions of individual components
6. Overview of cell membrane

5. Introduction
• „CELL MEMBRANE
 Cell membrane is a protective sheath, enveloping the
cell body.
 It is also known as plasma membrane or plasmalemma.
 This membrane separates the fluid outside the cell called
extracellular fluid (ECF) and the fluid inside the cell called
intracellular fluid (ICF).
 The cell membrane is a semipermeable membrane. So,
there is free exchange of certain substances between
ECF and ICF.
 Thickness of the cell membrane varies from 75 to 111Å

6. COMPOSITION OF CELL MEMBRANE
• Cell membrane is composed of three types of
substances:
• 1. Proteins (55%)
• 2. Lipids (40%)
• 3. Carbohydrates (5%).

7. Stucture of cell membrane

8. Daveson – Danielli model

11. Robertson – Unit mem model

12. Fluid mosaic model
Singer & Nicolson

13. Fluid mosaic model

14. Fluid mosaic model

15. Fluid mosaic model

16. Fluid mosaic model

27. Reference
• https://www.slideshare.net/arshadchemist1/the-cell-
membrane-function
• https://www.slideshare.net/seemi31/cell-membrane-
70706555
• https://www.slideshare.net/harshrajshinde1/cell-
membrane-53215807
• https://www.slideshare.net/RIZWANABBAS3/plasma-
membrane-structure-and-function
• https://www.mdc.edu/asa/documents/competencies/
pdf/PCB4023%20Molecular%20and%20Cell%20Biology
.pdf
• https://slideplayer.com/slide/4217509/

28. Youtube links
• https://www.youtube.com/watch?v=qBCVVsz
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• https://www.youtube.com/watch?v=nsklF1w4
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