Download cell membrane PPT - Liberty Union High School District

Target
7. I can explain the role of the cell
membrane.
8. I can explain why the cell
membrane is semi-permeable.
9. I can describe the structure of the
plasma (cell) membrane.
10. I can identify whether a specific
type of cell transport is active or
passive.
Cell Membrane
Semipermeable: controls what
enters and exits the cell.
Phospholipids
 Cell membrane composed of
phospholipids.
Hydrophillic head
“water loving”
Hydrophobic tail
“water fearing”
Phospholipid Bilayer

Types of Cell Movement
1. Active transport: requiring energy
2. Passive transport: requiring no
energy from the cell
Passive Mechanisms
1. Osmosis
Water moves from an area of
greater water concentration to an area
of lower water concentration.
Passive Mechanisms
2. Diffusion
the movement of particles from a
high to low concentration until both
sides are equal.
P
P
Low Concentration
membrane
P
High Concentration
Passive Transport
3. Facilitated Diffusion
Same as diffusion, high to low, but
with the help of a carrier protein.
ATP:
AdenosineTriPhosphate
 ATP is the usable form of energy
for your cells.
Active transport
Transport of particles from areas of low
to high concentration with carrier proteins
and energy from ATP.
(walking up the slide)
How Does that Look in a
Cell?
B: Facilitated
Diffusion
A:
Passive
Diffusion
C: Active
Transport
Endocytosis and Exocytosis
 Endocytosis:
The intake of materials from outside
the cell by engulfing them. (eating)
 Exocytosis:
The release of materials from the
cell, out of the cell (pooping)
Exocytosis:
Inside of Cell
Outside of Cell
Endocytosis
Cellular
Membrane
Vesicle
p
P
P
p
Inside of Cell
Outside of Cell
Which of the following best
describes the plasma membrane?
A) Single layer of phospholipids that controls
what goes in or out of the cell.
B) Bilayer of phospholipids that controls what
goes in or out of the cell.
C) Single layer of proteins that controls what
goes in or out of the cell
D) Bilayer of proteins that controls what goes
in or out of the cell
True or False
The cell membrane is Selectively
permeable, which means it determines
what goes in and out of the cell.
True or False
Passive transport requires energy for
molecules to move from high to low
concentration.
Which of the following is the
movement of water particles from
high to low concentration?
A) Osmosis
B) Diffusion
C) Facilitated Diffusion
D) Active Transport
Which of the following moves
particles with the help of a protein
from high to low?
A)
B)
C)
D)
Osmosis
Diffusion
Facilitated Diffusion
Active Transport
Active Transport
A. Movement of particles high to low but
with the help of a protein
B. Low to high but with the help of a
protein and ATP
C. Movement of water high to low
D. Movement of particles high to low
Which of the following is NOT
true for active transport?
A) Uses proteins
B) Molecules are usually too big to
cross on their own.
C) Needs energy
D) Moves from high to low
True or False
Passive Transport moves molecules
from low to high.
Endocytosis
A.
B.
C.
D.
Low to high but with ATP
Engulf large molecules
Releases large molecules
Movement of particles high to low
but with the help of a protein
Which of the following does NOT
use a protein?
A)
B)
C)
D)
Active Transport
Endocytosis
Facilitated Diffusion
None of these
Diffusion is
A. Movement of particles high to low
B. Low to high but with the help of a
protein and ATP
C. Movement of particles high to low
but with the help of a protein
D. Movement of water high to low
Exocytosis
A. Low to high but with ATP
B. Engulf large molecules
C. Releases large molecules
D. Movement of particles high to low
but with the help of a protein
Facilitated Diffusion
A. Movement of particles high to low
B. Movement of particles high to low
but with the help of a protein
C. Low to high but with the help of a
protein and ATP
D. Movement of water high to low