Lesson: 10.7 Cell Organelles: Endoplasmic reticulum, Golgi apparatus, Lysosomes, and Vacuoles
Explain the function of the endoplasmic reticulum, golgi apparatus, lysosomes, and vacuoles.
8th Grade Life Science Ryland
Thursday October 7, 2010
10.7 ER, GA, Lysosome, and Vacuole
- Explain the function of the endoplasmic reticulum, golgi apparatus, lysosome, and vacuole in cellular functions.
- What is the function of the mitochondria, chloroplast, and ribosomes.
- PH WKST: Looking Inside Cells
- Cell Model Project
1. Do Now (5)/Review mitochondria, chloroplasts, and ribosomes (5)
· Students enter the classroom, take out their binders, turn to their Do Now sheet for the week and copy down the objective for the day.
· After this has been completed they answer the Do Now question. If they are unable to answer the question on their own they are allowed to use their notes.
· After 3-4 minutes has elapsed (depending on the difficulty of the question) students are called together to review the Do Now.
· In this case, the functions of each organelle is reviewed (the do now question) but also other details of the organelles are reviewed: what types of cells do they appear in, what do they need in order to complete their jobs, what tricks do we use to remember these/what are their one words summaries?
· MITOCHONDRIA: take in glucose and oxygen to make energy for the cell, membrane bound organelle so it is only found in eukaryotes, one word summary of function: energy
· CHLOROPLASTS: take in carbon dioxide, water, and sunlight to produce food in the form of glucose for the cell, membrane bound organelle found only in eukaryotes, but only found specifically in plants and some protists. One word summary of function: food.
· RIBOSOMES: create proteins for the cell, not surrounded by a membrane so they are found in all cells, one word summary of function: proteins.
2. You tube videos (10)/Notes: Endoplasmic reticulum, golgi apparatus, and lysosome, and vacuole (15)
· After a review of the previous day’s organelles we continue with today’s organelles: the ER, golgi apparatus, lysosome, and vacuole.
· The class fills in the Endoplasmic reticulum guided notes. (file)
· We then watch the you tube video on the ER: it is a short video, but it shows how it is in a dynamic state with both production and transport vescicles.
· The class fills out the golgi apparatus guided notes. (file)
· We then watch the you tube video on the golgi apparatus. This video is a little more goofy but it gets the student’s attention and speaks to how the golgi apparatus works with materials from the ER AND how it modifies, packages, and ships those materials to different parts of the cell.
· The class fills out the lysosome notes.
· We then watch the you tube video on lysosomes. Again, this video is a little goofy, but it speaks to what is in lysosomes and how they function in the cell.
· The class fills out the notes on vacuoles.
3. Cell model project introduction (10)
· Students complete a 3-D model of a cell using the materials of their choice.
· The first sheet passed out to the students is the cell model project announcement: this lets parents know what their student will be working on outside of class.
· The second paper passed out is the actual student description of the project.
· In the in class introduction we review the three parts of this assignment (the model itself, the key, and the cell comparison).
· Students are also shown good and bad examples of cell model projects from past years and they have to rate them as good or bad and explain what is good or what is missing from the model.
· Students are also given the opportunity to ask questions about the project.
· They have one week to complete the project (completely outside of class)
· On the back of the description is a suggested breakdown of how one might complete the project. We talk about as a class budgeting time for this based on other homework assignments for science class and preparation for the upcoming test.
4. Wrap-up/Homework (5)
· Wrap-up and homework includes previewing the homework (what they have to do, any pitfalls they might run into) and reviewing the material for the day. If it is not an exit ticket, then it comes in the form of questions for the class. Students are picket to answer either by hands raised or by strategic cold calling to make sure that certain students are on track with the day’s lesson.
· Questions for today:
· What are the three functions of the ER? (produce lipids, phospholipids, and proteins, and distribute them throughout the cell, mainly to the GA)
· What are the three things that the golgi apparatus does to materials is receives? (It modifies, packages and ships them to other parts of the cell or outside the cell)
· What do lysosomes have in them that allows them to complete their jobs? (chemicals, more specifically enzymes)
· What is the function of lysosomes? (to break down large food particles, wastes/harmful substances, and old cell parts)
· What do vacuoles do? (store water, food, or wastes for the cell)
· How are vacuoles different from plant to animal cells? (In plant cells there is 1 large vacuole and it mainly stores water, in animal cells there are many smaller vacuoles and they may store, food, water, or waste)
- Guided notes: ER, GA, Lysosomes, Vacuoles
- You tube videos: ER, GA, Lysosomes
- Cell Model Project Announcement
- Cell Model Project Description
- PH WKST: Looking inside cells.
- This lesson went well; the students did well with the review of yesterday’s organelles, they were engaged in the notes and the videos, and they were excited about the cell model project.
- Pluses about the lesson:
- Because of the Monday vocabulary day format to the week, the notes on each organelle are easy to put together and draw on student’s prior knowledge because they already have a basic definition of what each of the organelles does with in the cells. These notes serve to reinforce these key points, add a layer of details, get them thinking about what cells they belong in, and how they work as a part of the system of the cell as a whole.
- Because cells are microscopic and the organelles cannot be seen clearly with even a light microscope, the videos help give students an idea of what they look like in the cell (for the electron microscope video) or help them to understand the role of them in the cell as a whole system.
- The lesson has repetition of the key points and multiple access points for a variety of learners.
- Deltas for the lesson:
o I would like to find another video for the endoplasmic reticulum, in addition to the one I have, so that they can both see what it looks like in the cell but also have a visual review of its function.
o I would like to find a useful video for the vacuole, it has a simple function, but a visual that would highlight the differences in vacuoles between plant and animal cells would be great.