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Nic's Study Sets > Bio Ch. 4 (part 2) Membrane Transport > Flashcards

Bio Ch. 4 (part 2) Membrane Transport Flashcards

1
Q

Phospholipid bilayer

A

The framework of the cell membrane

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2
Q

Phospholipids are ________ molecules

A

Amphipathic

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3
Q

Hydrophobic tails

A

(water-fearing) region faces inward

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4
Q

Hydrophilic heads

A

(water-loving) region faces outward

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5
Q

Phospholipids

A

main components of the cell membrane

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6
Q

Proteins

A

Add function, such as, transport, enzymes, attachment, & communication

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7
Q

Carbohydrates

A

Cell to Cell recognition site (like lock and key)

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8
Q

Cholesterol

A

Only found in animal plasma membranes, Strengthens the plasma membrane

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9
Q

“Mixed composition

A

several molecule are embedded or attached

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10
Q

Membranes are ________

A

semifluid

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11
Q

________ are relatively weak
Not bonded to each other

A

Phospholipids

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12
Q

The plasma membrane is _______ _______

A

Selectively permeable

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13
Q

Passive transport requires __ ______

A

NO ENERGY (no ATP)

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14
Q

Does simple diffusion required membrane proteins?

A

No

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15
Q

Do facilitated diffusion require the diffusion of solutes through transport proteins in the plasma membrane.

A

Yes

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16
Q

Active Transport requires ______

A

Energy (ATP)

17
Q

Exocytosis

A

Material inside the cell packaged into vesicles and Expelled into the extracellular fluid (outside the cell)

18
Q

Endocytosis

A

Plasma membrane invaginates (folds inward) to form a vesicle that brings substances (extracellular fluid) into the cell

19
Q

Phagocytotic

A

White blood cell engulfing bacteria

20
Q

Osmosis

A

Diffusion of water across a selectively permeable membrane

21
Q

Tonicity

A

Occurs in response to a difference in solute concentration between the fluids on either side of the membrane

22
Q

Isotonic

A

Equal concentrations of solute and water; no osmosis

23
Q

Hypertonic

A

Concentration of solutes greater outside the cell than inside the cell; water flows out

24
Q

Hypotonic

A

Concentration of solute greater inside the cell than outside the cell; water flows in

Nic's Study Sets (15 decks)

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