Ch. 7 Membrane Structure and Function

Question 0

A channel protein in the plasma membrane of a plant, animal, or microorganism cell that specifically facilitates osmosis, the Diffusion Of Free Water across the membrane

Answer 0

Aquaporin

Question 1

Having both a hydrophilic & hydrophobic region

Answer 1

Amphipathic

Question 2

The movement of a substance across a cell membrane against its concentration or electrochemical gradient, mediated by specific transport proteins & requiring an Expenditure Of Energy

Answer 2

Active Transport

Question 3

A region along which the DENSITY of a chemical substance increases or decreases

Answer 3

Concentration Gradient

Question 4

The spontaneous movement of a SUBSTANCE down its concentration or electrochemical gradient, from a region where it’s more concentrated to a region where its less concentrated

Answer 4

Diffusion

Question 5

The Cellular Secretion of biological molecules by the fusion of vesicles containing them w/ the plasma membrane

Answer 5

Exocytosis

Question 6

Cellular Uptake of biological molecules & particulate matter via formation of vesicles from the plasma membrane

Answer 6

Endocytosis

Question 7

LIMP. Lacking turgor (stiffness) as in a plant cell in surroundings where there is a tendency for water to leave the cell

Answer 7

Flaccid

Question 8

The passage of molecules or ions down their electrochemical gradient across a biological membrane w/the ASSISTANCE of specific transmembrane transport proteins, requiring no energy expenditure

Answer 8

Facilitated Diffusion

Question 9

Referring to a solution that, when surrounding a cell, will cause the Cell To Lose Water

Answer 9

Hypertonic

Question 10

Referring to a solution that, when surrounding a cell, will cause the cell to Take Up Water

Answer 10

Hypotonic

Question 11

Referring to a solution that, when surrounding a cell, causes No Net Movement of water into or out of the cell

Answer 11

Isotonic

Question 12

The Diffusion of Free Water across a selectively Permeable Membrane

Answer 12

Osmosis

Question 13

The diffusion of a substance across a biological membrane W/No Expenditure of Energy

Answer 13

Passive Transport

Question 14

A phenomenon in walled cells in which the cytoplasm SHRIVELS & the plasma membrane pulls away from the cell wall

Answer 14

Plasmolysis

Question 15

A transport protein in the plasma membrane of animal cells that Actively Transports Sodium out of the cell & potassium into the cell

Answer 15

Sodium Potassium Pump

Question 16

The ability of a solution surrounding a cell to cause that cell to GAIN OR LOSE water

Answer 16

Tonicity

Question 17

SWOLLEN or distended, as in plant cells

Answer 17

Turgid

Question 18

A type of endocytosis in which the cell Ingests Extracellular Fluid & its dissolved solutes

Answer 18

Pinocytosis