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Flashcards in Cells Deck (27)
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The orientation if membrane proteins

Peripheral and integral

1

Peripheral

Not embedded in the lipid bilayer, weakly bound to the surface if a membrane, a protein

2

Integral

Attached to the plasma membrane permanently or anchored in

3

Transport a membrane protein

Left- provides hydrophilic channel that is across the membrane.
Right- moves a substance by changing the shape from one side to the other

4

Enzymatic activity of the membrane proteins

A protein that is built into the membrane. May be an enzyme with it's active site exposed to substances in the adjacent solution

5

ECM attachment to the cytoskeleton and extracellular matrix

Helps maintain the cells shape and secures the proteins in their locations. Made up of micro filaments and other elements.

6

Cell- cell recognition-

Identification tags, for membrane proteins and other cells. Made up if glycoproteins.

7

Intercellular joining

Join together in different ways or types of junctions: gap junctions or tight junctions

8

Signal transduction

Binds with a specific shape, the shape can fit the shape if a chemical messenger. The protein may change so it can relay the message inside the cell

9

What membrane structures are important for cell-cell recognition?

Carbohydrates: glycolipids, glysoproteins

10

Which molecules easily cross the membrane?

Nonpolar: hydrocarbons and carbon dioxide

11

How are molecules transported that do not easily cross the membrane:

Through a process called active transport

12

Diffusion

The random thermal motion of particle of liquids, gases, or solids

13

Osmosis

The diffusion of free water molecules across a selectively permeable membrane

14

Hypotonic

The cell will lose water in a solution

15

Hypertonic

The cell will absorb water when in solution

16

Isotonic

No reaction

17

Active transport:

Moves molecules up the concentration gradient

18

Passive transport

Moves molecules down the concentration gradient

19

Exocytosis

When bilingual molecules come out of the cell

20

Endocytosis

When the molecules go in the cell

21

Selectively permeable membrane

A property of biological membranes that allows them to regulate the passage of substances across them

22

Facilitated diffusion

Across the biological membrane with assistance of transmembrane transport proteins

23

Exoytosis

The cellular secretion of biological molecules by the fusion of vesicles containing then with the plasma membrane

24

Endocytosis

Cellular uptake of biological molecules and particulate matter via formation of vesticle form the plasma membrane

25

Phagocytosis

Edit endocytosis: large substances or small organisms are taken up by a cell

26

Pinocytosis

A type of endocytosis in which the cell ingests the extracellular fluids and it's dissolved solutes