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4x, 10x, 40x

Electron Microscope

• Uses electrons to produce an image.

• Types: SEM and TEM– Scanning Electron

Microscope (SEM)• Electrons scan the surface

of a specimen• Produces a 3-D image

– Transmission Electron Microscope (TEM)• Designed to look at

structures inside a cell• Capable of greatest

magnification

• Limitations of Microscopes

– Magnification is limited by the strength of the lens.

• Calculating magnification: ocular lens x objective lens = total magnification

• Example: ocular (10x) x objective (40x) = total magnification (400x)

– As magnification increases, resolution (sharpness) decreases.

Prokaryote Coloring - Handout

• Complete the handout.

• Glue/tape the handout into your notebook.

Microscope Lab – Letter E and Which Cell Is It?

• Complete lab and submit for a lab grade

Written Response #1

1. Why must specimens be thin for a compound light microscope?

2. Which microscope provides the highest possible magnification?

3. If the ocular lens (eyepiece) is 10x and the objective lens is 10x, then the total magnification is?

4. As magnification increases, resolution ___________.

The Cell Theory

• Through the cooperative efforts of many individual scientists, a unifying cell theory developed:

1. All living organisms are made of cells.

2. Cells are the structural and functional units of organisms.

3. All cells come from pre-existing cells.

Hooke Looked at Cork Cells

Schleiden’s sketches of an assortment of

cells

Cell Theory

1. All organisms are made of cells.

2. Cells are the structural and functional units of organisms.

3. All cells come from pre-existing cells.

• So, to recap…

• How about a song?

Mini-Poster – Cellular Adaptations

• Once you have been checked, you and your table partner will create a mini-poster to represent the cellular adaptations. Include the following on your poster:

– Picture

– Description of why the adaptation is important.

– Color and neatness matter for this

Written Response #2

• Draw and fill in the chart below about three different types of cells:

– You do not have to draw the cells

Written Response #3

• In this true/false activity:

– Number 1-13 under Written Response #3

– You and your partner will discuss the question, each of you will record your response and share your answer with the class. Be prepared to justify your answer.

– You are allow to search answers.

– You will be limited to 20 seconds per question.

Written Response #3

1. The water-hating hydrophobic tails of the phospholipid bilayer face the outside of the cell membrane.

2. The cytoplasm essentially acts as a “skeleton” inside the cell.

3. Plant cells have special structures that are not found in animal cells, including a cell wall, a large central vacuole, and plastids.

4. Centrioles help organize chromosomes before cell division.

5. Ribosomes can be found attached to the endoplasmic reticulum.

Written Response #3

6. ATP is made in the mitochondria.7. Many of the biochemical reactions of the cell

occur in the cytoplasm.8. Animal cells have chloroplasts, organelles that

capture light energy from the sun and use it to make food.

9. Small hydrophobic molecules can easily pass through the plasma membrane.

10.In cell-level organization, cells are not specialized for different functions.

Written Response #3

11.Mitochondria contains its own DNA.

12.The plasma membrane is a single phospholipid layer that supports and protects a cell and controls what enters and leaves it.

13.The cytoskeleton is made from thread-like filaments and tubules.

Written Response #4

• Explain how the following organelles ensure that a cell has the proteins it needs: nucleus, rough and smooth ER, vesicles, and Golgi apparatus.

Wanted Ad: Cell Structures and Organelles

• Design a wanted posters for 2 different cell structures or organelles.

• On the wanted poster, you must tell:– Who you are (what type of cell)– Why you need the organelle or

structure.– A way of contacting you (make it

up)– A reward for obtaining the

organelle or structure (make it up)

• You must also include a picture of the cell you are representing and the organelle or structure you are seeking

Cell Organelles Review Sheet

Cellular Structure Concept Map -Handout

• Get a handout from the front table

• When you are finished, glue/tape the handout into your notebook

vacuole

lysosome

mitochondrion

golgi apparatus

centriole

ribosome

cell membrane

rough ER

nucleus

DNA

nucleolus

smooth ER

peroxisome

vacuole

chloroplast

golgi apparatus

ribosome

cell membrane

cell wall

rough ER

nucleus

nucleolus

DNA

smooth ER

peroxisomemitochondrion

Cell Compare - Handout

• Complete the handout with your table partner. Once finished, raise your hand so I can come check you off for completion.

• Once you have been checked off, glue/tape the handout into your notebook.

https://www.youtube.com/watch?v=oqGuJhOeMek

Written Response #5

• For this written response, you may use your phone to help you research the answer:

1. What is the endosymbiotic theory?

2. How does it explain the presence of certain organelles in eukaryotic cells?

Cell Analogy Activity

Stem Cell Research

• Advancements in stem cell research.

• Written Response #6:

1. What makes stem cell research controversial?

2. What can we do to prevent going to far? What would happen if we do go too far?

Types of Specialized Cells in the Human Body