Warm up 1021 Turgor Pressure WYW Explain how

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=LEs 9 J 2 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