Bio 156 Chapter 5

Front 1

____ are microbial populations anchored to one epithelial lining or another by stiff, sticky polysaccharides of their own making

Back 1

Biofilms

Front 2

____ ____ either passively let specific solutes diffuse through a membrane spanning channel in their interior or actively pump them through

Back 2

transport proteins

Front 3

The ____ ____ bind extracellular substances, such as hormones, that can trigger change in cell activities.

Back 3

receptor protiens

Front 4

multicelled organisms have _____ ____ that are unique identity tags for each species

Back 4

recognition protiens

Front 5

______ ______ help cells of the same type locate each other and remain in the proper tissues.

Back 5

adhesion protiens

Front 6

______ _____ form channels that match up across the plasma membrane s of two cells. They let signals and substances rapidly flow from the cytoplasm of one into another

Back 6

communication proteins

Front 7

A ____ _____ is a differnce in the number per unit volume of molecules (or ions) of a substance between adjoining regions.

Back 7

concentration gradient

Front 8

_____ is the name of the net movement of like molecules or ions down a concentration gradient

Back 8

diffusion

Front 9

An ____ ____ is simply a difference in electric charge between adjoining regions

Back 9

electric gradient

Front 10

A ____ ____ is a difference in pressure exerted per unit volume between two adjoining regions.

Back 10

pressure gradient

Front 11

_____ _____ is the action of the membrane allowing some molecules to pass freely though, and denying entry to others.

Back 11

selective permeability

Front 12

In ____, a molecule is transported into the membrane by the sinking inward to allow entry

Back 12

endocytosis

Front 13

In ______, a molecule exits the cell by a vesicle fusing with the plasma membrane, and the contennts are released to the inside.

Back 13

exocytosis

Front 14

Give two examples of active transport.

Back 14

calcium pump, sodium potassium pump.

Front 15

___ ___ is the mass movement of one or more substances in response to pressure, gravity, or another force.

Back 15

bulk flow

Front 16

_____ is the diffusion of water across a semipermeable membrane., to a region where the water concentration is lower.

Back 16

osmosis

Front 17

____ _____ is a solution with a lower level of solutes that the solution it is compared to

Back 17

hypotonic