Cell structures

1. Mitochondria.
2. Ribosomes.
3. Golgi apparatus.
4. Endoplasmic reticulum.
5. Lysosomes and vesicles.
6. Chloroplasts.
7.Vacuoles.
8. Cell wall.
9. Centrosomes (centrioles).
10. Cilia and flagella/pili.
11. Plasma membrane.
12.Cytoplasm.
13. Nucleus (DNA, nuclear membrane, nucleolus).
14. Cytoskeleton.

Organelles

Complete table

Lab. Unit 1

Background

What is  meant by diffusion?

What is meant by osmosis?

Indicate with an arrow the net flow of water

Hypothesis

EXPERIMENT

Objectives

Materials

Procedure

Results

Conclusions

1.            In the winter, grass often dies near the roads that have been covered in salt to remove the ice. What do you think is the reason the grass dies?

2.            Define the following: isotonic, hypertonic, and hypotonic solution.

3.            How do animal cells and plant cells react in a hypotonic solution?

4.            These red blood cells were placed in three different solutions:  isotonic, hypertonic, and hypotonic. Say which image corresponds to each solution.

Video: "The hidden life of the cell"

BBC.Our.Secret.Universe.The.Hidden.Life.of.the... 

Cell differentiation. Homework.

Chicken video
Zebra fish video
Gene control video

Worksheet


JUST IF YOU WANT TO KNOW MORE:

 Why don't our arms grow from the middle of our bodies? 

The question isn't as trivial as it appears. Vertebrae, limbs, ribs, tailbone ... in only two days, all these elements take their place in the embryo, in the right spot and with the precision of a Swiss watch. Intrigued by the extraordinary reliability of this mechanism, biologists have long wondered how it works. Now, researchers have solved the mystery.  

Worksheet

Assessment criteria unit 1

1. Given a diagram of a cell, label the organelles , explain their functions and describe their structure.
2. Differentiate prokaryotic cells from eukaryotic cells.
3. Differentiate plant cells from animal cells.
4. Explain the nutrition function in cells.
   1. Explain how substances enter the cell and how they are excreted.
   2. Define metabolism.
   3. Diferentiate catabolism from anabolism and give an example of each.
5. Explain the interaction function in cells.
   1. Explain the types of stimuli and give an exple of each.
   2. Explain the types of responses and give an exple of each.
   3. Describe the main types of cell movement.
6. Explain the purpose of cell division in unicellular and multicellular organisms.
7. Describe the types of cell division.
8. Know the discoveries related to the cell by Antonie van Leeuwenhoek, Robert Hooke, Robert Brown, J.E. Purkinje, M. Schleiden, T.Schwan and Rudolf Virchow.
9. State the principles of cell theory.

Mitosis homework

Draw this diagram of mitosis in your notebook, label it and answer the questions.

Extra: Borrowing from Biology — Nature's Nanotechnology

When it comes to molecular manufacturing, why not turn to a real expert for advice? Nature's been making nano-size machines since life on earth began. With that kind of experience, maybe it can teach us a thing or two about making machines one millionth of a millimeter in size.

Machinery that is small needs motors and gears that are even smaller. Nanotechnologists are just starting to tackle that problem, but nature solved it a long time ago. Flagella are corkscrew-shaped propellers that transport bacteria like tiny motorboats. The long, stringy flagella, connected to a hook structure, fit over a rod that rotates inside a ring attached to the bacterium. As the rod rotates, the flagella twirl around, pushing water down and behind them to thrust the bacterium forward. The motion is a lot like the scooping one your hand makes while you're swimming.

Liposomes are an example of man-made machines copied from nature. Many cancer-fighting drugs are great at killing cancer cells, but are toxic to healthy cells, too. Liposomes are bubbles of fat that can be loaded with drugs and injected into patients. Because they're similar to the fatty membrane that surrounds all cells, they sneak by the body's defenses. The fat layer keeps the drugs from spreading all over healthy cells and holds them safely inside the bubble until it reaches the disease site. Then, if designed properly, the liposomes self-destruct and release the drug where it does the most good — and the least harm.

1. What is Nanotechnology?
2. What is the name of the nano structure that allows some cells to move?
3. What are liposomes and what are they used for?
4. Watch this video of an example of a liposome made by LivonLabs  and explain how it works. See video in YouTube
   
5. A cell is the basic unit that makes up living things. Scientists are designing nanotechnologies that will enter a cell and cause a specific thing to happen. Do you think a nanotechnology that could enter a cell and affect its function might be effective in treating certain diseases, such as cancer? Why or why not? Write a short paragraph answering whether or not you think nanotechnologies could be useful.

http://www.eduplace.com/kids/hmsc/5/a/cricket/cktcontent_5a1.shtml#gene
 http://worldschoiceproducts.com/index.php?main_page=index&cPath=28

Structure of the cell and types of cells

Pronunciation of the new terms. Scroll down to find a list of the terms and click the speaker icon to hear each term. If it doesn't work, click too on the speaker icon on the  flashcard.
  
Cell model I: Cells Alive