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Cell Size Notes

Cell Size Notes

Assessment

Presentation

Biology, Science

10th Grade

Medium

NGSS
MS-LS1-2, MS-LS1-3, HS-LS1-3

+4

Standards-aligned

Created by

Kara Simpson

Used 31+ times

FREE Resource

11 Slides • 25 Questions

1

Cell Size Notes

by Kara Simpson

2

Multiple Choice

Cells are many different sizes and shapes.

1

True

2

False

3

Multiple Choice

The structure of a cell helps with its

1

function

2

wants

3

speed

4

shape

4

​Cell Size

​Why are cells so small?

  1. ​Transport of materials

    1. ​Diffusion

      1. ​less efficient over long distances

    2. ​Cytoskeleton

      1. ​Weaker and less efficient when cells are longer

  2. ​Cellular communication

    1. ​Longer distances = longer communication time

    2. ​Cells use signal proteins to communicate

5

​Cell Size

The efficiency of cell INCREASES as cell size DECREASES

  • ​Oxygen transportation

  • ​Waste removal

  • ​Homeostasis

  • ​Food transportation

  • ​Signal transduction

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6

Multiple Select

Select all that apply: All organisms need to be able to efficiently:

1

Obtain oxygen & nutrients from environment

2

Remove waste

3

Maintain homeostasis (ex: body temperature)

7

Multiple Choice

Cells want to _________ their efficiency at carrying out life processes

1

reduce

2

maximize

3

slow down

4

prevent

8

Multiple Choice

Most cells are ______ because it maximizes their efficiency.

1

Small

2

Large

9

​Large Cells

​Large cells are inefficient in movement of materials into and out of the cell.

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10

Multiple Select

Select all that apply: Cells can’t be too big because . . .

1

Need to take in nutrients and release waste

2

Need to move materials quickly in/out

3

Inefficient if cells are large

11

Multiple Choice

The larger the cell, the _______ it will take to transport materials, process nutrients, or release wastes.

1

Longer

2

Faster

12

Multiple Choice

Cells are most efficient when they are _____.

1

Small

2

Large

3

Fat

4

Skinny

13

​Surface Area to Volume Ratio

Surface area = size of plasma membrane

​Volume = space taken up by the inner contents of a cell

​Relationship between surface area and volume

  • ​Large surface area and Small volume = a high surface area to volume ratio

    • ​MOST efficient

  • Small surface area and Large volume = low surface area to volume ratio​

    • ​LEAST efficient

14

Multiple Choice

Surface area of a cell refers to

1

the area exposed to the external environment.

2

the amount of space inside of the cell.

15

Multiple Choice

Volume refers to

1

the area exposed to the external environment.

2

the amount of space inside of the cell.

16

​Calculating SA:V (Surface Area to Volume ratio)

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17

​Surface Area to Volume Ratio

​Larger number = more efficient cell

  • ​More surface area and less volume

​Smaller number = less efficient cell

  • ​less surface area and more volume

18

Multiple Choice

Cells want a _______ SURFACE AREA and a ______VOLUME.

1

Small; Small

2

Large; Large

3

Large; Small

4

Small; Large

19

Multiple Choice

Cells that are ____ have a greater surface area compared to volume (SA:V ratio).

1

Small

2

Large

20

Multiple Choice

Question image

CLICK ON IMAGE: Which cell would have the greatest surface area and smallest volume?

1

1um cube (smallest)

2

2um cube (middle)

3

4um cube (largest)

21

Multiple Choice

Question image

CLICK ON IMAGE: Which cell would have the smallest surface area and largest volume?

1

1um cube (smallest)

2

2um cube (middle)

3

4um cube (largest)

22

​What are the benefits of a high surface area to volume ratio?

  • ​Less surface area

    • ​cell has difficulties bringing in nutrients needed by the cell

      • ​causes the cell to starve

    • ​more difficult to get waste OUT of the cell

      • ​causes the cell to become toxic

  • ​More volume

    • ​cell needs more nutrients

    • ​cell produces more wastes

23

Multiple Select

Question image

Select all that apply: Why is a large SA:V better?

1

More area to let in nutrients and release waste

2

Processes occur more quickly

3

Cell is more efficient

4

Larger space for more storage of nutrients

24

Poll

Can a cell be too SMALL?

Yes

No

Maybe

Squirrel

25

​Cell Survival

​Cells need certain things to survive:

  • ​nutrients (sugars, oxygen, water, etc.)

  • ​organelles (mitochondria, ​Golgi apparatus, ​ER, ​Ribosomes, etc.)

26

Multiple Choice

Cells can’t be too small because . . .

1

Need to hold parts necessary for function (ex. DNA and organelles)

2

Need to be large enough to build an organism

3

Can't function unless they are large

27

Multiple Select

What are some parts that cells need to function?

1

Organelles

2

DNA

3

Nutrients (macromolecules)

28

​Large Cells DO Exist

​Some cells are relatively large compared to others:

  • ​epithelial cells (skin cells)

  • ​nerve cells

  • ​muscle cells

  • ​connective tissue cells

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29

Large Cells

​Large cells maintain efficiency by:

  • ​changing shape

  • ​increase number of organelles

  • ​increase number of nucleui

  • ​modify structures

  • ​increase amount of nutrients taken into the cell

  • ​increase surface area using villi on cell surface (intestinal cells, lung cells), folding (Gogli apparatus, ER, mitochondria), or stacking (thylakoids)

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30

Multiple Select

Cells that need to be larger for function can still maximize efficiency by:

1

Changing shape/modifying structures

2

Increasing number of organelles

3

Increasing amount of nutrients

31

Multiple Select

One way to increase surface area in parts with larger volume is to....

1

fold

2

stack

3

elongate/stretch

32

Multiple Choice

Question image

The mitochondria maximizes surface area by.....

1

folding of inner membrane

2

stacking

3

increasing number of proteins

4

reducing its size

33

Multiple Choice

SA is short for

1

Surface area

2

Volume

3

Cell size

4

Shape & area

34

Multiple Choice

V is short for

1

Surface area

2

Volume

3

Varies

4

Velicity

35

Multiple Select

Based on what you just learned about SA, V, and cell size: Why might elephants have ears that are very thin and elongated?

1

Maximize surface area of very large animal to regulate body temperature

2

Make it easier for them to hear clearly

3

Way to attract mates

36

Multiple Select

Based on what you just learned about SA, V, and cell size: Why are lung cells very branched in structure?

1

Maximize surface area for gas exchange to occur

2

Reduce lung size and volume

3

Prevent harmful materials from getting into lungs

Cell Size Notes

by Kara Simpson

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