Cells Flashcards
What is semi permeable and allows some materials to pass through freely, while other materials cannot?
Phospholipid bilayer
The membrane contains what three things?
Cholesterol
Proteins
Carbohydrates
On the outer surface are receptor _______ which send signals to the inside of the cell.
Proteins
Transport ______: move needed substances or waste through the plasma membrane.
Proteins
Nonpolar _______ is repelled by water and is in the phospholipids.
Cholesterol
What prevents fatty acid tails from sticking to each other?
Cholesterol
Plasma membrane is known as a _____ _______ ________ because the components such as the phospholipids can move sideways within the membrane.
Fluid mosaic model
Which kind of diffusion requires no energy and the molecules move from an area of high to low concentration?
Simple diffusion.
What is a passive process which means no energy is used to make the molecules move, they have a natural kinetic energy.
Diffusion
What is the diffusion of water?
Osmosis
OAS means it cannot cross the membrane and therefore will influence the overall net movement of water.
What is OAS an abbreviation for?
Osmotically active substance
Which type of diffusion doesn’t require energy and uses transport proteins to move high to low concentration?
Facilitated diffusion.
Which type of transport requires energy or ATP and moves materials from low to high concentration against concentration gradient?
Active transport.
What is the name of the process in which a cell forms and invagination and materials dissolve in water to be brought into cell, also known as cell drinking?
Pinocytosis
What process captures yeast cells by membrane extension of an immune system cell?
Phagocytosis
