Activity #42 A Closer Look

Challenge Question:

Initial Thoughts:

Evidence:

Levels of Organization:

Analysis Questions:

1. Observe the pictures of cell in Figure 2, “Animal Cells.” Cells 1,2, and 4 were taken with a scanning electron microscope, which shows the surface of the cell. This type of microscope magnifies the cell much more than the microscope you use in class. You can see that the cells have quite different shapes: some are rounded, while others are elongates, flat, or rugged. These shapes depend on the cell functions in the body. Try to match each cell with one of the following descriptions. (Answer this question in the table below)
2. Based on its description, which of the four cells described in Questions 1 is a nerve cell? Which is a red blood cell? Which is a white blood cell? Which is a skin cell? Explain how you were able to match the type of cell with its function. (Answer this question in the table below)

Description / Pictures that is matched with / Type of Cell / What does the structure tell you about its function?
a. These cells have long branching parts that send signal s to distant parts of the body.
b. These cells form an even covering on the surface of areas like the inside of the mouth.
c. These round human cells are unusual because they do not have a nucleus. They are full of a protein that carries oxygen to all parts of the body.
d. These cells are able to crawl around the body to attack bacteria and other foreign material. Ruffles on the cell membrane lead the way as the cells moves.


4. Explain why membranes are so important to cells.

Bacterial Cell: This is an illustration of a bacterial cell, or bacteria. Bacteria are all prokaryotic creatures, meaning they have no nucleus to enclose their DNA. If you were to look at actual bacteria under a microscope, it would not look exactly likethis. But, you can use this diagram to learn the structures of a generic bacterial cell, the locations of these structures, their functions, and how these structures compare to other types of cells. Label and color the structures below.

Structure /

Function (see Shark Book pg 326)

Cytoplasmpg 90
Genetic material
Cell Wall
Cell Membrane
Ribosomes
Flagellum/Flagella

Amoeba: This is an illustration of an amoeba, a kind or Protist. Protists include many kinds of microbes. They are all eukaryotic creatures, meaning their DNA is enclosed in nucleus inside the cell, just like animal cells. In fact, Protists are sometimes describes as animal-like and plant-like. However, unlike plants and animals, protists are unicellular. Also, because they are made of only one cell, protists are not or very little differentiated, meaning they do not have different kinds of cells that do different jobs. If you were to look at an actual amoeba under a microscope, it would not look exactly like this. But, you can use this diagram to learn the structures, the locations of these structures, their functions, and how the structures found in an amoeba compare to other types of cells. Label and color the structures below.

Structure /

Function (see Shark Bookpage 336)

Food vacuole
False foot/ pseudopod
Water/contractile vacuole
Nucleus
Cell membrane
Cytoplasm pg 90 /

Animal Cell: This is an illustration of an animal cell. If you were to look at an actual animal cell, it would not look exactly like this. In fact, there are many different kinds of specialized cells within one animal. For example, in humans, we have blood cells, nerve cells, cheek cells, etc. which all look different but share essential animal cell qualities. You can use this diagram to learn the structure of a generic animal cell, the location of these structures, their function and how these structures compare to other types of cells. Label and color the structures below.

\

Structure /

Function (see Shark Book page 91)

Vacuole
Lysosome
Ribosome
Golgi body
Cytoplasm
Nucleus
Cell (plasma) membrane
Mitochondria
Endoplasmic reticulum(smooth and rough)pg 90

Plant Cell: This is an illustration of a plant cell. If you were to look at an actual plant cell, it would not look exactly like this. However, we can use this diagram to help us learn the structures of a plant cell, their locations, functions, and how these structures compare to other types of cells.
Label and color the structures below.

Structure /

Function (see Shark Book page 90)

Vacuole
Cell membrane
Cell wall
Ribosomepg 91
Golgi bodypg 91
Cytoplasm
Nucleus
Mitochondriapg 91
Endoplasmic Reticulum
(smooth and rough)
Chloroplast /

“CellCity” Modeling Cell Structures:
1. State the function performed by each numbered structure in the figure.

1

2

3

4

5

6

7

8

2. Now name a cell structure that performs each of these same functions.

  1. Construction site = ______
  2. Transport Company = ______
  3. Power Plant = ______
  4. Food processing plant=______
  5. Waste Disposal Plant =______
  6. City Hall = ______
  7. Storage Tanks =______
  8. City gate = ______

3. Does cell city represent a plant cell or an animal cell? Explain your answer.

Summary:
In the beginning of Activity # ___ I thought the answer to the challenge question was…..

but now I think (or still think) ……

My evidence for this is ……

Choose one or more summary sentence starters to complete.