Biotech Flashcards
(24 cards)
What is the process by which substances move across the cell membrane without the use of energy?
Passive transport
True or False: Diffusion is a form of passive transport.
True
What is the movement of water across a selectively permeable membrane called?
Osmosis
Which type of transport requires the use of energy to move substances against their concentration gradient?
Active transport
Fill in the blank: Active transport moves substances from an area of _____ concentration to an area of _____ concentration.
low, high
What is the process by which large molecules are engulfed by the cell membrane and transported into the cell?
Endocytosis
Which type of endocytosis involves the engulfment of solid particles by the cell membrane?
Phagocytosis
What is the term for the process by which cells release substances from inside the cell to the outside environment?
Exocytosis
True or False: Exocytosis is a form of passive transport.
False
What is the structure that helps facilitate the movement of substances across the cell membrane called?
Protein channel
Fill in the blank: The cell membrane is selectively permeable, allowing only certain _____ to pass through.
substances
What is the term for the movement of substances from an area of high concentration to an area of low concentration?
Diffusion
Which type of transport involves the movement of substances with the help of transport proteins but does not require energy?
Facilitated diffusion
True or False: Osmosis is the movement of water from an area of low solute concentration to an area of high solute concentration.
False
What is the term for the process by which cells expel waste materials or harmful substances from inside the cell?
Excretion
Fill in the blank: In active transport, substances are moved _____ their concentration gradient.
against
Which type of active transport uses ATP as an energy source to move substances across the cell membrane?
Primary active transport
True or False: Endocytosis is the process by which cells release substances outside the cell.
False
What is the term for the transport of large molecules out of the cell using vesicles?
Exocytosis
Fill in the blank: In osmosis, water moves from an area of _____ solute concentration to an area of _____ solute concentration.
low, high
Which type of diffusion involves the movement of water molecules across a selectively permeable membrane?
Osmosis
True or False: Phagocytosis is a form of endocytosis.
True
What is the term for the process by which cells take in substances by engulfing them with the cell membrane?
Endocytosis
Fill in the blank: Facilitated diffusion involves the use of _____ to help transport substances across the cell membrane.
transport proteins
