Glencoe Life iScience, Grade 7, Student Edition: Life science chapter Flashcards


Set Details Share
created 5 weeks ago by Kayleej14
4 views
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

Doesn’t require energy from the cell.

Passive transport

2

Some move by_______. They spread out from areas of high concentration to areas of low concentration.

Diffusion

3

The number of particles of a substance in a given volume.

Concentration

4

Since the cell membrane is made up of a phospholipid by layer larger molecules or those that are polar Kimmel through special proteins in the cell membrane.

Facilitated Diffusion

5

Water moving across the cell membrane.

Osmosis

6

Water will move from an area of ______ concentration to an area of ________concentration.

High

Low

7

Requires energy from the cell to move materials through a membrane. This is usually moving substances from areas of lower to higher concentration.

Active Tranport

8

Occurs when large bit of material is captured within a pocket in the membrane and then moved into the cell.

Endocytosis

9

Needs to get rid of large materials. Example expelling proteins or hormones made by a cell.

Exocytosis

10

A cell’a size is limited to its ___________ . This limitation occurs because materials need to be able to travel to all parts of the cell.

Surface area- to -volume ratio

11

When do cells use energy?

Active transport

Making the products of the cell.

12

How do you get energy?

Take in food (lipid, carbohydrates)

13

Chemical respiration is a series of chemical reactions that convert the energy in food molecules into a usable form of energy called?

ATP

14

Cellular Respiration

Stage one:

_______ occurs in cytoplasm.

-Breaks glucose into smaller particles, producing ATP.

Glycolysis

15

Cellular Respiration

Stage two:

_______ occurs in mitochondria.

-Requires oxygen

-Produces large amounts of ATP

-Forms two waste products______ and _______.

Aerobic Respiration

carbon dioxide and water

16

Cellular Respiration

Alternate stage two:

- Releases energy from food when ______is not present.

-Produces ____ ATP then aerobic respiration.

Oxygen

Less

17

States that all living things are made of one or more cells, the cell is the smallest unit of life, and all new cells come from precasting cells.

Cell Theory

18

Form by joining many small molecules together.

Macromolecule

19

Macromolecules hat form when long chains of molecules called nucleotides join together.

Nucleic Acids

20

Long chains of amino acid molecules.

-Macromolecules necessary for nearly everything cells do.

Protiens

21

Large macromolecule that does not dissolve in water.

Lipid

22

One sugar molecule, two sugar molecules, or a long chain of sugar molecules make up a ______?

Carbohydrate

23

The ___ states that the cell is the basic unit of all living things.

Cell Theory

24

Store energy, provide structural support, and are needed for communication between cells.

Carbohydrates

25

Which macromolecule is made from amino acids?

A. Lipid

B. Protien

C.

Protiens

26

Flexible covering that protects the inside of a cell from the environment outside a cell.

Cell Membrane

27

Stiff structure outside the cell membrane, generally in plant cells.

Cell Wall

28

Fluid inside a cell that contains salts and other molecules.

Cytoplasm

29

Network of threadlike proteins that are joined together.

Cytoskeleton

30

Membrane surrounded component of a eukaryotic cell with specialized functions.

Organelle

31

Pat of a eukaryotic cell that directs cell activity and contains genetic information stored in DNA.

Nucleus

32

A membrane bound organelle that uses light energy and makes food-a sugar called glucose- from water and carbon dioxide in a process known ass photosynthesis.

Chloroplast

33

What is the difference between a cell wall and a cell membrane?

A cell wall helps to maintain shape and gives structural support.

34

Which organelle is used to store water?

A. Chloroplast

B. Lysosome

C. Nucleus

D. Vacuole

D. Vacuole

35

What is the purpose of the cytoskeleton?

It provides the cell with an internal framework that gives it shape and helps it to move.

36

The movement of substances through a cell membrane without using the cell’s energy.

Passive Transport

37

The movement of substances from an area of higher concentration to an area of lower concentration.

Diffusion

38

The diffusion of water molecules only through a membrane.

Osmosis

39

The process by which molecules pass through a cell membrane using special proteins called transport proteins.

Facilitated Diffusion

40

The movement of substances through a cell membrane using the cell’s energy.

Active transport

41

The process during which a cell takes in a substance by surrounding it with the cell membrane.

Endocytosis

42

The process during which a cell’s vesicles release their contents outside the cell.

Exocytosis

43

What is the difference between active and passive transport?

Active transport uses the cell’s energy and passive transport does not.

44

What is the process that a vesicles use to move a substance out of a cell?

Exocytosis

45

Why is energy needed in active transport?

Substances move from an area of lower concentration to an area of higher concentration and this requires energy.

46

What is the difference between osmosis and diffusion?

Osmosis only occurs with water molecules, and diffusion is any substance that crosses a membrane.

47

What is limited b a cell’s surface-area-to-volume ratio?

A. Cell shape

B. Cell size

C. Cell surface area

D. Cell volume

B.Cell size

48

A series of chemical reactions that convert the energy in food molecules into a usable form of energy called ATP.

Cellular respiration

49

A process by which glucose, a sugar, is broken down into smaller molecules.

Glycolysis

50

A reaction that eukaryotic and prokaryotic cells can use to obtain energy from food when oxygen levels are low.

Fermentation

51

A series of chemical reactions that convert light energy, water, and carbon dioxide into the food energy molecule glucose and give off oxygen.

Photosynthesis

52

What is the difference between cellular respiration and fermentation?

Fermentation is used when oxygen levels are low.

53

Which contains pigments that contain light energy?

A. Chloroplast

B. Mitochondrion

C. Nucleus

D. Vacuole

A. Chloroplast