Which molecule keeps phospholipids from sticking to each other?
protein
lipid
carbohydrate
cholesterol
Large molecules such as glucose move down the concentration gradient with the help of proteins
active transport
osmosis
exocytosis
facilitated diffusion
Property of the cell membrane alllowing some materials to pass through while keeping others out
diffusion
osmosis
semi-passive
selective permeability
Process by which a cell surrounds and takes in material from its environment
endocytosis
osmosis
endosymbiosis
exocytosis
Which molecule aids transmitting signals from outside to inside the cell?
lipid
protein
cholesterol
carbohydrate
Movement of substances across the cell membrane from high concentration to low concentration
diffusion
endocytosis
exocytosis
active transport
Process by which a cell surrounds and removes materials from inside the cell
diffusion
endocytosis
exocytosis
osmosis
Which molecule aids in moving substances across the cell membrane, ex. facilated transport?
carbohydrate
lipid
cholesterol
protein
The cell membrane is responsible for maintaining _____________, a stable internal environment
metabolism
cytoplasm
homeostasis
energy
What is identified by item 4 on the cell membrane?
protein
carbohydrate
phospholipid
cholesterol
What is identified by item 1 on the cell membrane?
carbohydrate
protein
cholesterol
phospholipid
Diffusion of water molecules through the cell membrane down (with) the concentration gradient
active transport
facilitated diffusion
osmosis
exocytosis
Which type of transport requires energy to move substances across the cell membrane?
passive transport
diffusion
osmosis
active transport
Nonpolar molecules (ex: CO2 & O2) move across the lipid bilayer down the concentration gradient
active transport
diffusion
osmosis
facilitated diffusion
What is identified by item 2 on the cell membrane?
protein
phospholipid
carbohydrate
cholesterol
Movement of substances against the concentration gradient; requires energy
osmosis
diffusion
active transport
passive transport