Cell Movement & Division

1. What must cells be able to get rid of

waste

2. How do particles tend to behave or move

Move from where they are very crowded to where the are less crowded

3. What is diffusion

Movement from areas of high concentration to areas of low concentration

4. What happened in the Diffusion Video we watched in class

We saw the food coloring disperse quickly throughout the beaker with hot water and slowly through the cold water

5. Do cells use energy for diffusion

no

6. What are cells filled with

water

7. What is Osmosis

The diffusion of water from high to low concentration

8. What happened in the Osmosis video we watched in class

We watched as the egg slowly increased in size as it was placed in a cup of vinegar. Once placed in corn syrup, the water inside the egg (high con.) went to an area of low con. (corn syrup) and the egg deflated. Then when it was in water again, it filled up because the water went from high to low

9. What has the highest concentration of water molecules

Pure water

10. What happens to the concentration of water when you mix something else in

You lower the concentration of h2o molecules

11. What does semipermeable mean

Only certain molecules go through

12. How does a wilted plant use osmosis

Plant takes in water to make it alive again

13. Small particles must cross what to get into the cell

Channels

14. What are these channels made from

proteins

15. What is passive energy

movement of particles without the use of energy DIFFUSION

16. What is active energy

requires use of energy to move from low concentration to high concentration

17. What is endocytosis

active transport by which a cell surrounds a large particle (protein) and encloses it in a vesicle to bring the particle into the cell.

18. What is exocytosis

active transport when large particles (waste) leave cells.

Cell Energy:

19. Why do cells need energy

to live, grow, & reproduce

20. Why do plants need the Sun

Plants capture energy from the Sun & change it into food by Photosynthesis

21. What is chlorophyll

Where is it found

22. What is the equation for photosynthesis

23. What is cellular respiration

uses oxygen to break down food

24. What is fermentation

the breakdown of food without the use of oxygen

25. What is cellular respiration equation

How is this easy to remember

26. Why do you get a burning sensation in your legs while running

Build up of lactic acid

27. Fermentation can produce what

Carbon dioxide

Cell Division & Mitosis:

1. Why is cell division important

for repairing damaged or dead cells

2. What is the life cycle of a cell

3. How do organisms grow

By increasing # of cells

4. Most of the life of a eukaryotic cell is spent in ______. Interphase

5. What occurs in the phase mentioned in Question 6

period of growth and development

6. Which cells are always in interphase

Why

7. What is copied or duplicated during interphase

DNA (Deoxyribonucleic acid) copied Chromosomes duplicate that holds DNA

8. What is mitosis

process in which the nucleus divides to form 2 identical nuclei

9. What are the stages of mitosis in order

Prophase

Metaphase

Anaphase

Telophase

10. What are chromosomes

structure in the nucleus that contains hereditary materials

12. What occurs during prophase

Centrioles are moving to poles of cell. Nuclear membrane is desintegrating.

13. What occurs during metaphase

Pairs of chromatids line up across the center of the cell.

14. What occurs during anaphase

Anaphase-Centromeres divide and spindle fibers shorten

15. What occurs during telophase

Telophase- Spindle fibers start to disappear, Chromosomes uncoil, new nucleus forms

16. What are the results of mitosis

Two identical nuclei

17. How many chromosomes does every cell (except reproductive cells) in your body have

How many pairs

18. How do bacteria reproduce

fission

19. Why can bacteria not use mitosis

No nucleus to divide

20. What is the difference between animal & plant mitosis

Animal can be pinched off, plant has to form new wall