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16 questions
What is it called when molecules move across the cell membrane from an area of high concentration to an area of low concentration through a helper protein?
Active transport is when molecules move ________ the concentration gradient.
against
up
down
with
A membrane that lets some things in and out but not everything is called?
Movement of water from an area of higher concentration to an area of lower concentration.
Molecules naturally move from areas of _______ to ______ concentration.
In osmosis, water moves ________ areas of higher solute concentration.
into
up
down
out of
What part of the cell regulates what can enter and leave the cell?
Some cells move large particles out of the cell through the process of:
Protein Synthesis
Endocytosis
Exocytosis
Cytoplasmic Streaming
The picture shows
Osmosis
Diffusion
Endocytosis
Exocytosis
What is homeostasis?
Balance, or maintaining relatively stable conditions.
The cell component that controls what can enter and exit the cell.
The idea that phospholipids and proteins slide past one another in the membrane.
The transport of molecules
What is the main difference between passive and active transport?
There is no difference.
Passive Transport moves molecules out of the cell, while Active Transport moves molecules into the cell.
Passive Transport ALWAYS transports with the help of proteins, while Active Transport does NOT.
Passive Transport does NOT require energy, while Active Transport DOES require energy.
Equilibrium refers to when the concentration of molecules on one side of the membrane are _________ to the other side of the membrane.
Greater than or equal to
Less
Equal
Greater
What is the main difference between diffusion and facilitated diffusion?
Diffusion requires the help of a protein to transport molecules, whereas in facilitated diffusion the molecules transport directly across the membrane.
Diffusion requires energy, whereas facilitated diffusion does not require energy.
Facilitated diffusion requires the help of a protein to transport molecules, whereas in diffusion the molecules transport directly across the membrane.
Facilitated diffusion requires energy, whereas diffusion does not require energy.
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