Warm up 10/21
Turgor Pressure
• WYW: Explain how forces and motions
affect an organism’s response to internal
and external stimuli to environment.
• L.C.: Our bodies require force and motion
to facilitate involuntary and voluntary
response to sustain homeostasis and
perform life functions.
Tugor pressure
http://www.youtube.com/watch?v=LEs9J2
IQIZY
Think-Pair-Share
1. What is force and motion and what role
does it play in everyday life?
2. How does pressure affect an organism?
3. What can you infer about a plants turgor
pressure?
4. What is tropism and how does
environmental stimuli affect its function?
5. How does force and motion, turgor
pressure and stimuli all relate?
Forces in Plants
C-Notes
PAGE
What differences do you
notice in these two plants?
This is caused by changes in
turgor pressure.
What is turgor pressure?
Outward force in a plant cell when the
vacuoles fill up with water, causing the cell
membrane to push against the cell wall.
Why is turgor pressure important in
plants?
• Gives them the rigidness to stand straight
and continue normal cellular functions
• Without normal turgor pressure, plants
begin to wilt
What does it mean to wilt?
• To wilt means to droop, become shriveled
in size and shape, and to lose strength
• Wilting does not mean the plant has died
What is emergence of seedlings?
• An outward force that seedling plants put
on their surroundings in order to emerge,
or rise up
Page 26- Draw this
Vacuole
HIGH turgor pressure
Vacuole
LOW turgor pressure