Cell Transport Study Set

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Plasma membrane

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Tags and Description

55 Terms

1

Plasma membrane

Flexible boundary between the cell and its environment; allows a steady supply of nutrients and other molecules to enter or leave the cell

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2

Permeable

Allow things to pass through

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3

Selective permeability

Allow some molecules to pass while keeping others out

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4

Plasma membrane controls what?

The movement of molecules in and out of the cell (like a chain-link fence)

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5

Phospholipids

Form a bi-layers with the tails facing in and the heads facing out

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6

Hydrophilic

Likes water, is water soluble

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7

The Polar Head of the phospholipid is ...

Hydrophilic

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8

The Non-Polar Tail of the phospholipid is ...

Hydrophobic

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9

Hydrophobic

Scared of water

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10

Fluid Mosaic Model

Flexible and embedded with protein

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11

Cholesterol

Stabilizes the phospholipids by preventing the tails from sticking

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12

Transport Proteins

Allow for the selective permeability of the membrane and moves larger materials in + our of the cell

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13

3 types of cell transport

Passive, Active, Bulk

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14

Active Transport uses ....

ATP/Energy

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15

Active transport moves cell what?

Against the concentration gradient

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16

Passive Transport uses .....

No energy

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17

Passive Transport is also called

Diffusion

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18

Facilitated Diffusion

Diffusion with the use of a protein

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19

Osmosis

The diffusion of water

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20

Water always goes from an area of ______ concentration to an area of ______ concentration

High, low

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21

Tonicity

the ability of a surrounding solution to cause a cell to gain or lose water

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22

Isotonic Solution

no net movement of water

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23

Hypotonic Solution

Concentration of water greater outside than inside, water moves into the cell

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24

Hypertonic Soultion

Water inside the cell is higher than outside the cell, water moves out of the cell

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25

Cell in hypertonic solution will ...

Shrivel

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26

Cell in hypotonic solution will ...

Swell and or burst

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27

Bulk transport

Transport bulk molecules by surrounding them with membrane "vesicles"

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28

Vesicular transports can be ...

Internal or external

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29

Endocytosis vesicle transports

Materials INTO a cell

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30

Exocytosis vesicle transports

Materials OUT of the cell

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31

Plasma membrane also maintains ...

Homeostasis

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32

The plasma membrane structure is composed of ...

Phospholipids

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33

Plasma membrane is "_______" in that it moves like waves in the ocean (Fluid Mosaic)

Fluid

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34

Proteins embedded in membrane _________ within the membrane like a boat at sea (Fluid Mosaic)

Move

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35

Proteins create a __________ or "__________" on the membrane surface.

Pattern, mosaic

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36

ATP stands for

Adenosine Triphosphate

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37

Diffusion means

Movement of particles carbon dioxide, oxygen, etc

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38

Channel Proteins

Transport protein that provides a tube-like opening in the plasma membrane through which particles can diffuse

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39

is used during active transport but not passive transport?

energy (ATP)

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40

Endocytosis

Process by which a cell takes in material by forming a vacuole around it

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41

passive transport

particle movement from an area of higher concentration to an area of lower concentration

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42

Exocytosis

Process by which a cell expels wastes from a vacuole

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43

facilitated diffusion

A form of passive transport that uses transport proteins

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44

Active transport concentration?

Particle movement from an area of lower concentration to an area of higher concentration

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45

Carrier proteins

Transport protein that changes shape when a particle binds with it

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46

Transport protein used to help what?

substances enter or exit the cell membrane

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47

Equilibrium is?

When the molecules of one substance are spread evenly throughout another substance to become balanced

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48

Exostosis does what?

A vacuole membrane fuses (becomes a port of) the cell membrane and the contents are released

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49

Endocytosis does what?

The cell membrane forms around another substance, EX: how the amoeba gets its food

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50

Diffusion concentration is?

Higher concentrations to areas of lower concentration

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51

Which/What solution(s) cause osmosis?

All 3 of them (Isotonic, hypotonic, and hypertonic)

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52

Isotonic solution is when water flows ...

In both direction, there is no grain or loss of water

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53

Hypertonic solution is when water flows ...

Out of the cell, the cell could then shrivel/shrink

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54

Hypotonic solution is when water flows ...

Into the cell, the cell could then swell or burst

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55

MAKE SURE TO KNOW THE PICTURES FOR THE TONICS AND ABLE TO LABEL IT

ALSO MAKE SURE TO UNDERSTAND EACH THING FROM THE CHART/MOST OF THE NOTES

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