Warm-Up
Answer the following questions in complete sentences.
What happens to a cell in a hypotonic solution?
In a hypotonic solution, a cell…
The insect C. spadabobbus lays its eggs in the
droppings of the bird P. notrealus. The larvae which
hatch from the eggs feed on the droppings. What
symbiotic relationship is this an example of?
The two organisms are in a _________________ relationship.
What happens to a cell in a hypotonic solution?
1.
2.
3.
4.
Gets bigger
Gets smaller
Stays the same size
Is at homeostasis
The insect C. spadabobbus lays its eggs in the
droppings of the bird P. notrealus. The larvae which
hatch from the eggs feed on the droppings. What
symbiotic relationship is this an example of?
1.
2.
3.
4.
Mutualism
Commensalism
Predation
Parasitism
Yesterday’s Picture
UNIT
4
UNIT
Active Transport
4
ATP
UNIT
Active Transport
4
• Diffusion = movement across a
membrane from HIGH to LOW.
high
low
low
low
low
UNIT
Active Transport
4
• Diffusion = movement across a
membrane from HIGH to LOW.
High concentration
• Moving from LOW to HIGH
requires energy.
Passive transport –
no energy required
Active transport –
energy IS required
AKA “diffusion”
Low concentration
UNIT
Active Transport
• Diffusion = movement across a
membrane from HIGH to LOW.
4
High concentration
• Moving from LOW to HIGH
requires energy.
• ATP is the energy molecule.
ATP
Low concentration
Active transport –
energy IS required
UNIT
Active Transport
• Diffusion = movement across a
membrane from HIGH to LOW.
4
ATP
• Moving from LOW to HIGH
requires energy.
• ATP is the energy molecule.
• Cells take in big particles through
endocytosis and release big
particles through exocytosis
(these require ATP).
ATP
Carousel Review Activity
Do as
many
as you
can!
UNIT
4
Closure
Answer the following question in a
complete sentence:
Why is energy required for active transport?
Suggested sentence stem:
Energy is required for active transport because…
Name/Nombre
Date/Fecha
Period ____