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Worksheetsplasma membrane
Total questions: 21
Worksheet time: 15mins
what is the plasma membrane made of?
phospholipids
cellulose
bradycardia
mydocardium
phospholipids form a
(a)
the plasma membrane is known as the fluid mosaic model, what is responsible for the fluid part?
hydrophobic
phospholipid
proteins
cellulose
what type of molecules can pass through phospholipids
lipid-soluble molecules
uncharged molecules
small molecules
large molecules
cholesterol is hydrophilllic
true
false
what's the function of the channel protein?
transport ions
transports large molecules
acts as a passage for ions
what's the function of carrier proteins?
activley transports large molecules
binds to molecules
changes molecules shape
transports ions
what's the function of receptor proteins
binds to the molecule
acts as receptors for cell signalling
transports ions
transports large molecules
carbohydrate chains that attach to the membrane protein, is called
(a)
carbohydrate chains that attach to the membrane lipids, is called
(a)
what is not a function of the plasma membrane
regulating the movement of substances
act as a selective barrier
protection of the cell
regulating cell membranes temperature
maintaining the cell shape
what's not a factor affecting the rate of diffusion?
size of molecule
temperature
surface area
size of concentration gradient
latent heat capicity
what can simply diffuse through phospholipid bilayer?
(a)
can ions and minerals use simple diffusion to diffuse through phospholipid bilayer?
yes
no
what does facilitated diffusion use to transport polar molecules in and out of cells
channel protein
peripheral proteins
carrier proteins
cholesterol
why can't polar molecules pass through by simple diffusion? and what do they use instead?
cannot cross through hydrophobic layer
cannot cross through hydrophilic layer
facillitated diffusion
simple diffusion
how are transport proteins adapted to their role? (carrier & channel)
channel proteins have pores which attract hydrophilic molecules
carrier proteins are more selective and allow one specific type of molecule to cross
channel proteins have a channel that allow ions to slide through
carrier proteins help to carry one type of molecule across
which of the following are true about aquaporins?
channel protein
hydrophillic pores
net movement = diffusion
hydrophobic pores
what's the difference between primary and secondary active transport?
primary involves the direct use of energy to move substances
secondary uses energy generated by the movement of one substance to transport another
primary uses secondary energy to move particles in and out of cells
secondary uses to ATP to then produce ADP.
which of the following is true if active transport is disrupted in cells?
can lead to an imbalance of ions
can produce more uncontrolled cell growth
development of diseases and disorders
imbalance of blood can occur
what are the chemical signals used in communication across cells called
(a)
