Chapter 5: Cells Flashcards Preview

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Flashcards in Chapter 5: Cells Deck (15):
1

1. all organisms are composed of one or more cells
2. the cell is the basic structural and functional unit of all living organisms
3. cells arise only from the division of preexisting cells

cell theory

2

to see cells and the structures within them we use what?

microscopes

3

use light to illuminate the specimen

light microscopes

4

use electrons to illuminate the specimen

electron microscopes

5

the ratio of the object as viewed to its real size

magnification

6

the minimum distance that two points in the specimen can be separated and still be seen as two points

resolution

7

-nucleoid region has no boundary membrane
-many species of bacteria have few internal membranes

prokaryotes

8

-nucleus is separated from the surrounding cytoplasm by membranes
-cytoplasm typically contains extensive membrane systems that form organelles

eukaryotes

9

between the plasma membrane and the central region contains cytosol and cytoskeleton

cytoplasm

10

an aqueous solution containing ions, various organic molecules, and organelles

cytosol

11

maintains cell shape and plays key roles in cell division and chromosome segregation

cytoskeleton

12

assemble amino acids into proteins

ribosomes

13

when the glycocalyx is loosely associated with the cells

slime ayer

14

when the glycocalyx is firmly attached with the cells

capsule

15

-specialized to carry out functions of energy metabolism and molecular synthesis, storage, and transport
-in cytoplasm

membranous organelles