The Plasmamembrane

Question 1

amphipathic

Answer 1

hydrophobic and hydrophilic regions.

Question 2

Integral Membrane Proteins

Answer 2

go though plasmamembrane

Question 3

Peripheral Membrane Proteins

Answer 3

found on one side of membrane

Question 4

glycoproteins

Answer 4

Carbohydrates covalently linked to proteins

Question 5

Glycolipids

Answer 5

Carbohydrates covalently linked to lipids

Question 6

Temperature and fluidity

Answer 6

Fluid: unsaturated
Viscous: Saturdated

Question 7

selectively permeable

Answer 7

allow some (but not all) molecules pass through

Question 8

Diffusion

Answer 8

passive movement of particles so they spread out into the available space.

Question 9

osmosis

Answer 9

diffusion of water across a semi-permeable membrane

Question 10

Isotonic Solution

Answer 10

Solution has same solute concentration as in cell.

Question 11

Hypertonic Solution

Answer 11

Solution has higher solute concentration as in cell.

Question 12

Hypotonic Solution

Answer 12

Solution has lower solute concentration as in cell.

Question 13

Tonicity

Answer 13

the ability of a solution to cause a cell to gain or lose water

Question 14

Plant cell in hypotonic solution

Answer 14

Turgid (normal)

Question 15

Plant cell in isotonic solution

Answer 15

Flaccid

Question 16

Plant cell in hypertonic solution

Answer 16

Plasmolyzed

Question 17

Transport proteins

Answer 17

integral membrane proteins that allow hydrophillic molecules to pass through the membrane.

Question 18

Facilitated Diffusion

Answer 18

passive diffusion of large/hydrophillic molecules with the help of transport proteins

Question 19

Channel Proteins

Answer 19

hydrophillic channel that molecules/ions use as a tunnel.

Question 20

Carrier Proteins

Answer 20

bind to molecules and change shape to shuttle them across membrane

Question 21

Electrochemical gradient

Answer 21

the combined concentration gradient and electrical charge that affects an ion.

Question 22

Active Transport

Answer 22

energy used to move substances against concentration gradient.(low to high)

Question 23

adenosine triphosphate (ATP).

Answer 23

The energy to move the molecules

Question 24

Transporters

Answer 24

specific carrier proteins or pumps that facilitate active transport.

Question 25

Primary Active Transport

Answer 25

moves ions across a membrane and creates a difference in charge. Is directly dependent on ATP

Question 26

Secondary Active Transport

Answer 26

does not directly require ATP. Is the movement of material due to electrochemical gradient.

Question 27

Exocytosis

Answer 27

transport vesicles migrate to the membrane, fuse with it, and release their contents

Question 28

Endocytosis

Answer 28

larger molecules, particles moved into cell.

Question 29

Phagocytosis

Answer 29

a cell engulfs large particles into a vacuole

Question 30

Pinocytosis

Answer 30

molecules are taken up when extracellular fluid is “gulped” into tiny vesicles

Question 31

Receptor Mediated Endocytosis

Answer 31

binding of specific molecules to receptors triggers endocytosis