Presentation of Assignment in Session 1.3
• Diseases or disorders related to abnormality of
mitosis or meiosis
Session No. 1.4. The
Cell: Transport
Mechanisms
Leila A. Allado-Ombat, PhD
Biology Department
College of Arts and Sciences
Caraga State University, Butuan City
Learning Objectives
The learners:
1. describe the structural components of the cell
membrane (STEM_BIO11/12–Ig-h-11)
2. relate the structure and composition of the cell
membrane to its function (STEM_BIO11/12-Igh-12)
3. explain transport mechanisms in cells (diffusion,
osmosis, facilitated transport, active transport)
(STEM_BIO11/12–Ig-h-13)
4. differentiate exocytosis and endocytosis
(STEM_BIO11/12-Ig-h-14)
Words that you will encountered
in this session
• Plasma membrane
phospholipid bilayer
phosphate & glycerol (polar head)
fatty acids (non-polar tail)
transmembrane or integral and peripheral
proteins
Words that you will encountered
in this session
• Transport mechanisms across
plasma membrane
simple diffusion
facilitated diffusion
channel proteins
active transport
carrier proteins
endocytosis, exocytosis
Group Activity (15 mins)
Presentation of the Result (3 mins
per group)
Cell membrane structure
Video on cell membrane structure and
function
Membrane Structure
1. Describe the plasma membrane.
2. Discuss the importance of the plasma
membrane and how indispensable it is
to the life of the cell.
3. Explain how plasma membranes are arranged in
the presence of water.
4. Enumerate structures found in a plasma
membrane.
Membrane Transport Mechanisms
• Video on Transport Mechanisms
Membrane Transport Mechanisms
Diffusion Without Membrane
Equilibrium
Passive and Active Transport
Movement of substance across
membrane
Facilitated Diffusion
Osmosis
Active Transport
• Primary Active Transport (ion-pump) – used ATP
Active Transport
• Types of Secondary Active Transport
Vesicular Transport
• Three process of endocytosis
Vesicular Transport
• Exocytosis – facilitated by membrane-bound
vesicle
Quiz
1.What is the major
component cell
membrane?
2.Name of transport
mechanism that requires
channel and carrier
proteins.
What do you call the process
that involved the movement of
water through a semipermeable membrane?
4. If the red blood cell will be
immersed in hypertonic
solution, what will happened
to the cell?
3.
5. A sugar molecule is
transported from lower
to higher concentration
with the aid of ATP.
What do you call this
mechanism?
Essay: Questions to Answer
1.Why does putting salt on
meat preserve it from
spoilage by bacteria?
2.Why do plant dies when
applied an excessive
amount of fertilizer?
Thank you for listening and
participating…….
References
• Plasma membrane structure video.
https://www.youtube.com/watch?v=moPJkCbKjBs
• Cell membrane transport.
https://www.youtube.com/watch?v=gOxRXn5r9Jo
• The plasma membrane. http://4.bp.blogspot.com/
• Types of membrane transport.
http://biologyhq.com/biology/images/membrane-transport.png
• The passive and active transport.
http://www.tokresource.org/tok_classes/biobiobio/biomenu/membr
anes/c8.7x17.transport.jpg
• Diffusion without membrane. A drop of dye diffused in the water
until equilibrium is reached.
https://upload.wikimedia.org/wikipedia/)
• Movement of substances across the cell membrane.
• https://www.rpi.edu/dept/chem-eng/BiotechEnviron/Membranes/bauerp/perm.gif
• Facilitated diffusion of molecules across cell membrane.
https://upload.wikimedia.org
• The state of plant and animal cell when exposed to different water
concentrations.
http://leavingbio.net/OSMOSIS%20AND%20DIFFUSION_files/image
009.jpg
• Types of secondary active transport uniport, symport and antiport.
http://www.perkepi.com/active-transport/
• The three processes of endocytosis.
https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/End
ocytosis_types.svg/2000px-Endocytosis_types.svg.png
• The transport of molecules out of the cell as mediated by
membrane- bound vesicles.
http://www.vce.bioninja.com.au/_Media/exocytosis_med.jpeg
•