Chap 6 Flashcards

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1
Q

Biological membrane

A

Separate cells from its external environment or creates intercellular components

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2
Q

Phospholipid heads

A

A phosphate group and glycerol

Negativity charged

Polar

Hydrophilic

Face outward the aqueous

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3
Q

Phospholipid tails

A

Two fatty acid chains

Uncharged

Nonpolar

Hydrophobic

Face inward towards each other

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4
Q

Biological membrane

A

Have a cell structure however membrane s of specific cells and organelle differ in the kinds of proteins and lipids

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5
Q

Glycolipids

A

Carbs+lipids
Less diverse group
Facilitate cell recognition

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6
Q

Glycoproteins

A

More diverse group

Serve as receptors for chemical signals

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7
Q

Cell arrangements

A

Cell arrangements themselves in tissues by two process

Cell recognition: one cell type specifically recognizes

Cell adhesion ; connections between two cell is strengthened

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8
Q

Cell junction

A

Specialized structures associated with the plasma membrane

Tight junction prevent substances from moving through the space between the cell

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9
Q

Gab junction

A

Channels run between membranes pores in adjacent

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10
Q

6.2 cell membrane is important in cell adhesion and recognition

A

Cell membrane also adhere to the extra cellular matrix

The transmembrane protein integrin binds to the matrix outside

The biding is noncovalent and reversible

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11
Q

6.4 active transport

A

Active transport moves substance against a concentration

The energy sources is often adenosine triphosphate

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12
Q

Primary active transport

A

Requires direct hydrolysis of atp

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13
Q

Secondary active transport

A

Energy cones from an ion concentration gradient

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14
Q

6.5. Large molecules

A

Endocytosis brings molecule and cell into a eukaryotic cell

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15
Q

Three types of endocytosis

A

Phagocytosis molecules or entire cells are engulfed

Pinocytosis a vesicle forms to bring small dissolved substances or fluids in cell

Receptor mediated macromolecules to be bind to receptor proteins integral membrane proteins located at specific sites on the cell membrane

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16
Q

Exocytosis

A

Exocytosis materials packaged in vesicles are secreted from a cell when it fuses with the cell membrane

17
Q

Salt sucks

A

Salt is a drying agent, it sucks water out of things