cell membrane

Question 1

what does cell membrane do

Answer 1

flexible and allows a unicellular organism to move

Question 2

what does cell wall do

Answer 2

gives the cell structure

Question 3

homeostasis means

Answer 3

a balanced internal condition of cells (happy state)

Question 4

homeostasis is also called

Answer 4

equilibrium

Question 5

homeostasis is maintained by

Answer 5

plasma membrane controlling what enters and leaves the cell

Question 6

diffusion means

Answer 6

molecules moving in or out of the cell

Question 7

osmosis means

Answer 7

diffusion specifically for water

Question 8

Functions of plasma membrane or cell membrane

Answer 8

Protective barrier
Regulate transport in and out of the cell
Allow cell recognition
Provide anchoring sites for filaments of cytoskeleton
Provide a binding site for enzymes
Interlocking surfaces bind cells together (junctions)
Contains the cytoplasm (fluid in cell)

Question 9

polar heads are

Answer 9

hydrophilic

Question 10

hydrophilic means

Answer 10

water loving

Question 11

nonpolar tails are

Answer 11

hydrophobic

Question 12

hydrophobic means

Answer 12

water hating

Question 13

the membrane being both hydrophilic and hydrophobic makes it

Answer 13

selective in what crosses

Question 14

hydro____ pass through easily

Answer 14

hydrophobic

Question 15

hydro_____ do not pass through easily

Answer 15

hydrophillic

Question 16

materials that are soluble in LIPIDS

Answer 16

pass through easily

Question 17

solubility means

Answer 17

dissolve

Question 18

what type passes through the membrane easily

Answer 18

small molecules and hydrophobic

Question 19

what type is it harder to pass through the membrane and they do not do on their own

Answer 19

Ions, hydrophilic molecules larger than water and large molecules such as proteins

Question 20

simple diffusion =

Answer 20

passive transport, molecules move from area of high to low concentration

Question 21

passive transport means

Answer 21

requires no energy

Question 22

diffusion =

Answer 22

passive process,
they have a natural kinetic energy

Question 23

EXAMPLE OF EVERYTHING

Answer 23

If there’s high concentration outside cell and low inside the cell will take in that substance in order to match the concentration with outside and reach homeostasis

Question 24

osmosis

Answer 24

-Diffusion of water across a membrane
- Moves from high water potential (low solute) to low water potential (high solute)

Question 25

Isotonic =

Answer 25

• when water and solvent concentration match inside and outside the cell (no movement) - the cell is at equilibrium
  (If on quiz and no movement say no net movement)

Question 26

Hypotonic

Answer 26

when more water outside than inside the cell and it gets bigger if too much water it bursts

Question 27

science word for burst -

Answer 27

lyse

Question 28

Hypertonic

Answer 28

cell has more water inside than out, water moves out cell shrinks