The document discusses active transport, endocytosis, and exocytosis in cells. It explains that active transport uses energy to move materials against their concentration gradient using transport proteins. Endocytosis and exocytosis transport materials across membranes within vesicles - endocytosis transports materials into the cell within vesicles formed by infoldings of the membrane, while exocytosis releases materials from vesicles fusing with the outer membrane. The document provides examples of these processes in cells.

1. Science SMART Board
King Faisal School
Cell Structure and Function
‘Active Transport, Endocytosis,
and Exocytosis’
Created by: Hamdy Karim
Grade level(s): 9th_Grade
Subject area: Biology

2. Objectives;
Students will be able to
answer the questions;
1. What are the types of Active
Transport?
2. Proteins can transport materials
against concentration gradient!
3. Do Endocytosis and exocytosis
transport materials across the
membrane in vesicles?
Done By:
Mr. Hamdy Karim
KFS, Riyadh, KSA.
3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis
‘Active Transport, Endocytosis,
and Exocytosis’

3. KEY CONCEPT Cells use energy to transport materials
that cannot diffuse across a membrane.
3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis

4. Proteins can transport materials against a
concentration gradient.
Active Transport
What is Active Transport?
The movement of materials against a
concentration difference is known as
active transport. Active transport
requires energy.
Cells sometimes must move materials
against a concentration difference
The movement of material against a
concentration difference is known as
active transport. Active transport
requires energy
3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis

5. 3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis
Endocytosis and exocytosis transport
materials across the membrane in vesicles.
Endocytosis
Large molecules, clumps of
food, and even whole cells can
be taken up by endocytosis.
Two examples of endocytosis
are phagocytosis and
pinocytosis.

6. 3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis
Endocytosis and exocytosis transport
materials across the membrane in vesicles.
Endocytosis
Endocytosis is the process of
taking material into the cell by
means of infoldings, or pockets,
of the cell membrane.
The pocket that results breaks
loose from the outer portion of
the cell membrane and forms a
vesicle or vacuole within the
cytoplasm

7. 3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis
Endocytosis
In phagocytosis, extensions of
cytoplasm surround a particle
and package it within a food
vacuole. The cell then engulfs it.
Example; Amoebas use this
method for taking in food.
Engulfing material in this way
requires a considerable amount
of energy and, therefore, is a
form of active transport.

8. 3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis
Exocytosis
Many cells also release large
amounts of material from the
cell, a process known as
exocytosis.
During exocytosis, the
membrane of the vacuole
surrounding the material fuses
with the cell membrane, forcing
the contents out of the cell

9. 3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis
Exocytosis
Your nerve impulses are transporting
through your nervous systems
between the gaps of neurons (nerve
cells) as chemical impulses.
These nerve impulses must be
converted into chemical signals that
transport through these tiny gaps.
These chemicals are stored in vesicles
within the nerve cells. These vesicles
release the chemicals to the next
nerve cell which triggers a new
electrical impulse in that cell.

10. 3.53.5 Active TransportActive Transport,, EndocytosisEndocytosis,,
andand ExocytosisExocytosis
Exocytosis
Your nerve impulses are transporting
through your nervous systems
between the gaps of neurons (nerve
cells) as chemical impulses.
These nerve impulses must be
converted into chemical signals that
transport through these tiny gaps.
These chemicals are stored in vesicles
within the nerve cells. These vesicles
release the chemicals to the next
nerve cell which triggers a new
electrical impulse in that cell.