Science L.7-11 Flashcards Preview

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Flashcards in Science L.7-11 Deck (30):
1

cell theory

a widley accepted explanation of the relationship between cells and living things

2

cell

basic structure for all living things

3

microscope

makes small things look bigger

4

organelle

carry out specific functions in the cell

5

cell wall

a rigid layer of nonliving material that surrounds the cell, and protects and supports it

6

cell membrane

controls what subsutances come into and out of a cell

7

nucleus

the cells "control center" directing all the cells activity

8

cytoplasm

the region between the cell membrane and the nucleas

9

mitochondria

the "power house" of the cell", it converts food molecules into energy the cell can use

10

endoplasmic reticulum

it's passageways carry proteins and other materials from one part of the cell to another

11

ribosome

function as factories to produce proteins

12

Golgi body

receives proteins and other materials from the endo. reticulum, packages them, and distributes them

13

chloroplast

captures energy from sunlight and uses it to produce food for the cell

14

vacuole

the storage areas of the cell

15

lysosome

small, round structures with chemicals that break down certain materials in the cell

16

element

any substance that cant be broken down anymore

17

compound

when two or more elements chemically combine

18

carbohydrate

energy rich compound includes sugar and starch

19

lipid

fats, oils, and waxes

20

protein

meat, fish, eggs, beans

21

amino acid

protein molecules made of smaller molecules

22

enzyme

typeof protein that can speed up a chemical reaction in a living thing

23

nucleic acid

long organic molecules that carry the instructions cells need to function

24

DNA

genetic material

25

RNA

helps make proteins

26

selectivity permeable

some substances can pass through the cell membrane others can't

27

diffusion

the main method by which small molecules move across the cell membrane

28

osmosis

the diffusion of water molecules through a selectively permeable membrane

29

passive transport

the movement of materials through a cell membrane without using energy

30

active transport

materials passing through membrane using energy