Chapter 5 (Membrane Structure and Function)

0.0(0)
Studied by 0 people
call kaiCall Kai
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/19

encourage image

There's no tags or description

Looks like no tags are added yet.

20 Terms

1
New cards

fluid mosaic model

o accepted model of cell membrane structure, o membrane as a mosaic of diverse protein moleceules in a bilayer of phospholipid molecules.

<p>o accepted model of cell membrane structure, o membrane as a mosaic of diverse protein moleceules in a bilayer of phospholipid molecules.</p>
2
New cards

Cell Membrane structure

-phospholipid bilayer, polar & non-polar

-Cell surface proteins, misonomer

-channel

-receptor

-cell surface marker

<p>-phospholipid bilayer, polar & non-polar</p><p>-Cell surface proteins, misonomer</p><p>-channel</p><p>-receptor</p><p>-cell surface marker</p>
3
New cards

selective permeability

Membrane allows some substances to cross more easily than others

4
New cards

diffusion

tendency of particles to move from more concentrated regions to less concentrated regions!

<p>tendency of particles to move from more concentrated regions to less concentrated regions!</p>
5
New cards

passive transport

o The diffusion of a substance across a biological membrane with no energy.

<p>o The diffusion of a substance across a biological membrane with no energy.</p>
6
New cards

osmosis

diffusion of water across a selectively permeable membrane.

<p>diffusion of water across a selectively permeable membrane.</p>
7
New cards

tonicity

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

8
New cards

isotonic

o =

o cells volume remains constant

<p>o =</p><p>o cells volume remains constant</p>
9
New cards

hypotonic

o solution with a solute concentration lower than that of a cell (too much water)

o cell gains to much water AND BURST

o In a plant cell, the plant becomes turgid and its very healthy!

<p>o solution with a solute concentration lower than that of a cell (too much water)</p><p>o cell gains to much water AND BURST </p><p>o In a plant cell, the plant becomes turgid and its very healthy!</p>
10
New cards

hypertonic

o solution with a solute concentration higher than that of a cell (losing water)

o Plant and animal cells both shrivel up AND DIE

<p>o solution with a solute concentration higher than that of a cell (losing water)</p><p>o Plant and animal cells both shrivel up AND DIE</p>
11
New cards

facilitated diffusion

°diffusion through selective pores in the membrane, from high > low concentration

<p>°diffusion through selective pores in the membrane, from high > low concentration</p>
12
New cards

aquaporin

A transport protein in the plasma membrane of cells, where there is a very rapid diffusion of water in and out certain cells

13
New cards

active transport

o use of cellular energy to transport molecules through a membrane using some sort of energy!

<p>o use of cellular energy to transport molecules through a membrane using some sort of energy!</p>
14
New cards

Sodium potassium pump

o uses ATP to create a high concentration of sodium ions outside the cells

<p>o uses ATP to create a high concentration of sodium ions outside the cells</p>
15
New cards

exocytosis

The movement of materials out of a cell, used to export bulky molecules!

<p>The movement of materials out of a cell, used to export bulky molecules!</p>
16
New cards

endocytosis

Cellular takes in substances via formation of new vesicles from the plasma membrane.

<p>Cellular takes in substances via formation of new vesicles from the plasma membrane.</p>
17
New cards

phagocytosis

Cellular "eating"; a type of endocytosis in which a cell engulfs a particle by wrapping cell membrane around it

<p>Cellular "eating"; a type of endocytosis in which a cell engulfs a particle by wrapping cell membrane around it</p>
18
New cards

Pinocytosis

° "cellular drinking"

°Cell gulps droplets of fluid into tiny vesicles

<p>° "cellular drinking"</p><p>°Cell gulps droplets of fluid into tiny vesicles</p>
19
New cards

receptor-mediated endocytosis

o uses receptors in a receptor-coated pit to interact with a specific protein, starting the formation of a vesicle.

<p>o uses receptors in a receptor-coated pit to interact with a specific protein, starting the formation of a vesicle.</p>
20
New cards

ATP

Adenosine triphosphate, the main energy source for cells.

<p>Adenosine triphosphate, the main energy source for cells.</p>