Transcript Cell transport with the environment

Passive and Active Transport
There are two ways that a cell transports materials
across the cell membrane.
1. Passive Transport : NO ENERGY (ATP)
2. Active Transport: ENERGY (ATP)
Big Hill
Passive and Active Transport
Passive Transport: Moving materials across the cell
membrane without using energy (ATP)
There are two kinds of passive transport:
1. Diffusion: Dissolved gasses, small particles
2. Osmosis: WATER ONLY
Passive and Active Transport
Diffusion: The process where particles such as
oxygen, carbon dioxide and sugar move from areas of
high concentration to an area of low concentration.
Passive and Active Transport
Osmosis: The process of diffusion involving only the
water molecule. Water molecules still move from an
area of high concentration to an area of low
concentration without the involvement of ATP.
Passive and Active Transport
Active Transport: Moving materials across the cell
membrane by using energy (ATP). Particles such as
sodium and potassium ions often need the help of ATP
to pass through the cell membrane. Active transport
occurs when the particle is moved against the gradient.
Low concentration
High concentration
Passive and Active Transport
Active Transport – Exocytosis and Endocytosis:
Sometimes particles are too big to move through
protein channels in the cell membrane. The cell then
uses exocytosis and endocytosis to move materials out
of the cell and into the cell.
Exocytosis
Wastes (toxins)
Hormones
Endocytosis
Bacteria
Proteins
Passive and Active Transport
Active Transport – Exocytosis occurs when particles
need to be moved from inside the cell to outside the
cell.
Exocytosis
Wastes (toxins)
Hormones
Exo = EXIT
Passive and Active Transport
Active Transport –Endocytosis: Endocytosis occurs
when cells need to move large particles from the
outside to the inside of the cell.
Endocytosis
Bacteria (White blood cells)
Proteins
Endo = INTO
Passive and Active Transport
Active Transport –Endocytosis and Exocytosis:
Passive and Active Transport
Follow up activity using clay models
Teal = Cell Membrane and Nucleus
Light pink = Molecules to be transported
Purple = Arrow showing passive transport (No energy)
Hot pink = Arrow showing active transport (Energy)
Passive and Active Transport
Use the following slides to help you make a
flipbook detailing active transport, passive
transport, diffusion, osmosis, endocytosis and
exocytosis. You will use this flipbook to study for
your test.
Passive Transport
Diffusion from inside the cell to outside the cell:
Low
Concentration
Oxygen, Carbon
Dioxide, sugar
High
Concentration
Passive Transport
Diffusion from outside the cell to inside the cell:
High
Concentration
Oxygen, Carbon
Dioxide, sugar
Low
Concentration
Passive Transport
Osmosis from outside the cell to inside the cell:
High
Concentration
Low
Concentration
WATER ONLY
Passive Transport
Osmosis from inside the cell to outside the cell:
Low
Concentration
High
Concentration
WATER ONLY
Active Transport
Active transport of a large molecule:
Low Concentration
Low Concentration
ATP
ATP
High Concentration
High Concentration
Low Concentration
ATP
High Concentration
Active Transport
Active transport exocytosis:
ATP
ATP
ATP
Active Transport
Active transport endocytosis:
ATP
ATP
ATP
Photosynthesis
Respiration
Worksheets
1.
Chapter 4 worksheet from Friday.
Thirty total questions.
2.
Chapter 4 Reinforcement worksheet
(front and back)