Uploaded by kimoniebellanfante

3rd lesson The Cell

advertisement

Herbert Morrison Technical High School 5E Lesson Plan

Teacher: Mr. Bellanfante Subject : Biology Topic: The Cell Date: Grade: 10 GTS Duration: 1 week Materials: Handouts Specific objective(s): Cognitive:

1.

Explain the function of the cell wall, cell membrane, nucleus, chromosomes, cytoplasm, ribosomes, 2.

mitochondria, vacuoles and chloroplast. Discuss the importance of selected microbes (Virus, bacteria, fungi; Positive and negative effects).

Affective

1.

Participates in class discussion. 2.

Shows self-reliance when working in class 3.

Co-operates in group activity.

Psychomotor:

1. Draw simple diagrams to show the structure of unspecialised plant and animal cells.

INTERVENTION:

Teacher will discuss each processes that causes the change of state of matter to fulfill the completion of the last lesson before starting this lesson.

Content:

Organelle - Membrane-bound body in the cytoplasm of a cell. Cell membrane - The cell membrane separates the contents of the cell from its external environment and regulates the movement of substances in to and out of the cell. Lysosomes - The cell’s garbage disposal system. Found only in animal cells, they are round.

Organelle

chloroplast(plastid) endoplasmic reticulum Flagellum Golgi apparatus mitochondria vacuole nucleus Ribosomes

Main function

photosynthesis, traps energy from sunlight • Rough endoplasmic reticulum - Transports the proteins synthesized at the ribosomes • Smooth endoplasmic reticulum- Produces and transports lipids locomotion, sensory 1) Transports and chemically modifies the substances in it e.g. proteins 2) Produces lysosomes

Job in the factory

solar panel Assembly line (where workers do their work) Finishing/packaging department The reactions of cellular respiration occur in the mitochondria and they are the “power houses” of the cell, producing energy in the form of ATP. Power plant Water tank Storage of dissolved substances such as mineral and ions, transportation, helps maintain homeostasis DNA maintenance, controls center of all activities of the cell, RNA transcription Chief Executive Officer (CEO) Build proteins Workers in the assembly line making things

ENGAGEMENT

The terms cell, organelles and its example will be brainstormed and discussed.

Formative Assessment

: Oral feedback

EXPLORATION

Students will sit in pairs and will be given a worksheet on cell to complete. Teacher will allow students to mark their work in class.

Formative Assessment

: Worksheet

EXPLANATION

Students will be expected to complete a Venn diagram of plant and animal cell showing differences and similarities.

Formative Assessment :

Venn diagram

ELABORATION

1. Comparing a Cell to a Factory Instruction: In the second column of the chart, write the name of the organelle that functions most like the factory worker described in the first column. In the third column, write a brief description of the function of the organelle in the cell.

Job in the Factory Chief Executive Officer (CEO) solar panel Assembly line (where workers do their work) Cell Organelle Function Workers in the assembly line making things Finishing/packaging department Ribosomes Build Proteins Power plant The factory wall with door The wall around the factory

Answer:

nucleus, chloroplast, endoplasmic reticulum, ribosomes, Golgi apparatus, mitochondria, cell membrane, cell wall

2.

Students will read handout 1A and discuss information in their groups. Teacher will facilitate discussion.

EVALUATION:

Students will complete the following questions. 1. Why the three differences matter: Having a cell wall is what gives plants their “rigidity.” The large vacuole must stay hydrated or the plant will wilt. • Chloroplasts are what allow plants to photosynthesize 2. Name the organelle in which respiration takes place. 3. Why are the leaves in plants green?

Assignment:

Draw simple diagrams to show the structure of unspecialised plant and animal cells. Following all the CSEC drawing criteria which will be given on a handout.

CELL STRUCTURES CROSSWORD

Down 1. "powerhouse" of the cell 2. organelles that break down substances 4. outer boundary of the cell 5. maintains the cell's shape 6. tool used to view cells 7. makes ribosomes 11. packacking and exporting; ____ body 12. in plants, structure outside the membrane; cell ___ Across 1. makes protein 5. interior of the cell, mostly water 8. 1st person to see cells 9. stores water; large in plants 10. transport within the cell; endoplasmic ____ 13. photosynthetic organelle in plants 14. tail-like structure that functions in movement

Handout 1 A

A microorganism or microbe is a microscopic organism, which may be single-celled or multicellular.

Bacteria

are single cell organism. Their cells are considered as prokaryotic because they do not have their genetic material in nucleus.

Advantages

   Fertilize fields (nitrogen fixation) Recycle nutrients (decomposers à breakdown dead organism and waster into nutrients. Produce food and medicine (food such as cheese, yogurt, vinegar, and medicine such as insulin, growth hormone and antibiotics such as streptomycin)  Bacteria in the guts of cows and other animals help breakdown the cellulose of the plants that they feed on.

Disadvantages

    It is also known as a disease-causing agent. Causes diseases such as dental cavities, tuberculosis, leprosy, cholera, syphilis. When bacteria enter the host body, it lowers the immune system of the body. Bacteria produce foul smell due to their decomposing products. Causes disease in plants and reduces its yield.

Virus-

A virus is an infectious particle that reproduces by "commandeering" a host cell and using its using the host to make more viruses.

Advantages of Virus:

  In genetics viruses are used as a vectors to introduce genes in the cell which are the case of study. They are used in the treatment of cancer and in gene therapy.   

Disadvantages of Virus:

 Causes a wide range of life threatening diseases in man which include HIV, chickenpox, influenza, avian flu, cold, sores, and common cold. Hosts with chronic viral infections can be carriers of infectious viruses as long as they live. It can be transmitted from one person to the next Viruses can cause cancer in humans and other species.

Fungi -

Fungi are unicellular or multicellular thick-cell-walled heterotroph decomposers that eat decaying matter example mold, mushroom

Disadvantages of fungi

1. Cause diseases and infections such as athlete's foot, ringworm, lung infections ... as well as irritating those with allergies 2. Decay food 3. Cause diseases of our crops 4. Ruin our clothing and other possessions

Advantages of fungi

: 1. Decompose dead organic matter to return nutrients to the ecosystem 2. Provide some food directly, like mushrooms 3. Used to produce or process other foods, like yeast for bread or alcohol, mold in blue cheese 4. Source of antibiotics

Download