Biological Membranes Flashcards

1
Q

primary membrane component, both my mass and mole fraction

A

lipids (triacylglycerols, free fatty acids, glycerophospholipids, cholesterol, waxes)

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2
Q

act as transporters, cell adhesion molecules, and enzymes within the cell membrane

A

proteins

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3
Q

can form a protective glycoprotein coat around the cell membrane and also function in cell recognition

A

carbohydrates

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4
Q

cell-cell junctions:

allow for rapid exchange of ions and other small molecules between adjacent cells

A

gap junctions

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5
Q

cell-cell junctions:
prevent solutes from leaking into the space between cells via a paracellular route, but do not provide intercellular transport like gap junctions

A

tight junctions

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6
Q

cell-cell junctions:

bind adjacent cells by anchoring to their cytoskeletons; anchor layers of epithelial tissue together

A

desmosomes and hemidesmosomes

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7
Q

membrane transport:
does not require energy because the molecule is moving down its concentration gradient or from an area with higher concentration to an area with lower concentration

A

passive transport

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8
Q

passive transport:
does not require a transporter; small, nonpolar molecules passively move from an area of high concentration to an area of low concentration until equilibrium is achieved

A

simple diffusion

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9
Q

passive transport:

uses transport proteins to move impermeable solutes across the cell membrane

A

facilitated diffusion

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10
Q

membrane transport:

requires energy in the form or ATP or an existing favorable ion gradient

A

active transport

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