Intro to human body

?
Passive transport is?
substances can cross a cell membrane down a concentration gradient without using energy
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Osmosis is?
Water molecules move across the membrane down the concentration gradient
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Simple diffusion is?
Lipid soluble materials dissolve in the membrane lipids crossing the membrane
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Channel mediated diffusion is?
Water soluble materials cross the membrane through channels
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Carrier mediated diffusion is?
Substances unable to diffuse use specialised protein carriers to attract and bind to these substances, helping them cross
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Selective permeability is where
Substances can either enter or leave a cell
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Plasma membrane properties that regulate the intracellular environment..
Partical size (eg water too big), pores (allow some, not others), pumps and carriers (import and export substances)
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Transmembrane proteins..
form channels and allow water soluble ions to cross the membrane
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Membrane proteins can be?
Enzymes, receptors, are attached to carbohydrate molecules
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Proteins in plasma are either..
Integral (embedded in protein) or peripheral (outside protein)
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Most proteins are?
Transmembrane (extra ---> intra)
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Integral proteins and membrane lipids are amphipathic which means..
They have hydrophilic and hydrophobic parts
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Lipids are
Amphipathic
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Polar part of lipid is the..
Head of the lipid (hydrophilic)
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Non polar part of lipid is the..
Fatty acid tail (hydrophobic)
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The plasma membrane, also known as..
The lipid bilayer
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Cells grouped together?
Tissues (specialised function)
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Tissues grouped together?
Organs
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Organs grouped together?
Systems
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Other cards in this set

Card 2

Front

Osmosis is?

Back

Water molecules move across the membrane down the concentration gradient

Card 3

Front

Simple diffusion is?

Back

Preview of the front of card 3

Card 4

Front

Channel mediated diffusion is?

Back

Preview of the front of card 4

Card 5

Front

Carrier mediated diffusion is?

Back

Preview of the front of card 5
View more cards

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