Topic: Cells Aim: Identify the 2 types of cells. Describe how living things are organized. Do Now: Take out Two types of Cells ISA for me to check. HW: Respiration Reading Notes due Monday! Atoms project due Monday!

Explain the meaning of the term membrane-bound organelle? Enclosed by a membrane nucleus mitochondria endoplasmic reticulum vacuole ribosome

Identify the two types of cells you read about in your ISA. Prokaryotic cells Eukaryotic cells

Greek meaning of Pro- before Prognosis: prediction about how something will develop

Greek meaning of Eu- well or good Eulogy: Words of praise for the deceased

Greek meaning of -karyo nut or kernel In biological terms: nucleus Prokaryote  Eukaryote  “before nucleus” “good nucleus”

1.PROKARYOTIC CELL: 2 types of cells 1.Does a prokaryotic cell have a nucleus? 2.Does it have membrane- bound organelles? 3.Does it have ribosomes?

NO NUCLEUS DNA in cytoplasm No membrane- bound organelles Ex: bacteria

Anthrax Strep Cholera

Did you know… Bacterial infections can be treated with antibiotics. E. coliStrep

2.EUKARYOTIC CELLS: 1.Does a eukaryotic cell have a nucleus? 2.Does it have membrane- bound organelles? 3.Does it have ribosomes?

HAVE A NUCLEUS Larger Contain membrane-bound organelles

Unicellular organisms Multicellular organisms

What kind of cells make up a multicellular organism? SPECIALIZED cells (have specific jobs)

Levels of Organization

Can you place these terms in the proper sequence from LEAST COMPLEX to MOST COMPLEX? Tissues Organ systems Cells Organism Organs

Levels of organization Muscle cellSmooth muscle tissue StomachDigestive system CellsTissues Organs System Organism

1. Cells: specialized Examples:

–Red blood cells carry oxygen.

–Muscle cells help you move.

Did you know… The longest living cells in the body are brain cells which can live an entire lifetime.

2. Tissue: group of similar cells that perform a specific function

Blood cells  blood tissue

Muscle cells  muscle tissue  movement

3. Organ: many tissues working together

Heart =organ made of muscle, nerve & blood tissue

4. Organ system: group of organs working together to perform a specific function

Skeletal & Muscular Systems

Circulatory System

5. Organism: a combination of organ systems that work together

Let’s summarize… 1.Describe the difference between prokaryotic and eukaryotic cells. 2.Describe the difference between unicellular and multicellular organisms. 3.Identify the type of cells that make up a multicellular organism. 4.Explain the organization of an organism.

Which of the following is a primary difference between prokaryotic and eukaryotic cells? (1) Prokaryotic contain a membrane-bound nucleus. (2) Prokaryotic contain DNA. (3) Eukaryotic cells contain a membrane bound nucleus. (4) Eukaryotic contain DNA.

Which sequence represents the correct order of levels of organization found in a complex organism? (1)Cells  organelles  organs  organ systems  tissues (2)Tissues  organs  organ systems  organelles  cells (3)organelles  cells  tissues  organs  organ systems (4)organs  organ systems  cells  tissues  organelles

These groups of cells represent different (1) tissues in which similar cells function together (2) organs that help to carry out a specific life activity (3) systems that are responsible for a specific life activity (4) organelles that carry out different functions.

Which statement best compares a multicellular organism to a unicellular organism? (1)A multicellular organism has organ systems that interact to carry out life functions, while a single- celled organism carries out life functions without using organ systems. (2)A single-celled organism carries out fewer life functions than each cell of a multicellular organism. (3)A multicellular organism always obtains energy through a process that is different from that used by a single-celled organism. (4)The cell of a single-celled organism is always much larger than an individual cell of a multicellular organism.

Review: Put the following terms in order from least complex to most complex: Tissue Organism Cell System Organ Organelle

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1.PROKARYOTIC CELL:

Review: 1. Which statement describing the cells in a body system is correct? (1)Each cell in the system is identical to the other cells in the system, and each cell works independently of the other cells. (2)Some cells in the system may be different from the other cells in the system, but all cells are coordinated and work together. (3)Each cell in the system is different from the other cells in the system, and each cell works independently of the other cells. (4)All cells in the system are identical to each other and work together.

2. Which of the following is a primary difference between prokaryotic and eukaryotic cells? (1) Prokaryotic contain a membrane-bound nucleus. (2) Prokaryotic contain DNA. (3) Eukaryotic cells contain a membrane bound nucleus. (4) Eukaryotic contain DNA.

3. Which sequence represents the correct order of levels of organization found in a complex organism? (1)Cells  organelles  organs  organ systems  tissues (2)Tissues  organs  organ systems  organelles  cells (3)organelles  cells  tissues  organs  organ systems (4)organs  organ systems  cells  tissues  organelles

4. These groups of cells represent different (1) tissues in which similar cells function together (2) organs that help to carry out a specific life activity (3) systems that are responsible for a specific life activity (4) organelles that carry out different functions.

6. Which statement best compares a multicellular organism to a unicellular organism? (1)A multicellular organism has organ systems that interact to carry out life functions, while a single- celled organism carries out life functions without using organ systems. (2)A single-celled organism carries out fewer life functions than each cell of a multicellular organism. (3)A multicellular organism always obtains energy through a process that is different from that used by a single-celled organism. (4)The cell of a single-celled organism is always much larger than an individual cell of a multicellular organism.

1.What do prokaryotic cells contain? 2.What is a cell organelle found in a eukaryotic cell and not in a prokaryotic cell? 3.Explain the difference between a unicellular and multicellular organism.

Put these structures in the correct order from least complex (simple) to most complex: Tissues Systems Cells Organs Organelles

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