A cell membrane is this, which means that only some substances may pass through and others cannot.
What is selectively permeable?
100
Osmosis is_______________.
What is the diffusion of water?
100
The difference between active transport and passive transport.
What is active transport requires the cell to use its own energy, while passive transport does not?
100
All living things are made of these.
What are cells?
100
All objects that take up space and have volume.
What is matter?
200
The main method by which small molecules move across the cell membrane.
What is diffusion?
200
Cells cannot function properly without adequate _____.
What is water?
200
In the book the author compares cell transport to this.
What is riding a bike up and down a hill?
200
Cells are produced from these.
What is "other cells"?
200
The five methods that all scientists use.
What are observation, inferring, predicting, classifying, and making models?
300
Three categories of things that pass through the cell membrane via diffusion.
What are oxygen, food molecules, and waste products?
300
In osmosis, water molecules move by this from a highly concentrated area to a lower concentrated area.
What is diffusion?
300
The function of a transport protein.
What is to "pick up" molecules outside or inside the cell and transports them?
300
Plant cells have these, animal cells do not.
What are cell walls and chloroplasts?
300
The study of the properties of matter and how it changes.
What is chemistry?
400
Because _____________ are always moving in a cell they bump into one another, push away from one another, and eventually spread evenly throughout the area.
What are molecules?
400
Compared to a normal red blood cell, a red blood cell that is in an environment with a lower water concentration would look like this.
What is deflated?
400
Transport proteins move these types of molecules.
What are calcium, potassium, and sodium?
400
The first scientist to observe cells.
Who is Robert Hooke?
400
The smallest form of matter, from which all elements are made.
What is the atom?
500
True or False? Molecules move by diffusion from an area of higher concentration to lower concentration.
What is true?
500
Compared to a normal red blood cell, a red blood cell that is in an area of high water concentration would look like this.
What is like a balloon?
500
True or False? Transport by engulfing is a form of passive transport.
What is false?
500
Because molecules must travel through the cytoplasm from the cell membrane to where it is needed, if the cell grew too large it could not function well enough to survive.
Why are cells so small?
500
The six forms of energy related to changes in matter.
What are kinetic, potential, chemical, electromagnetic, electrical, and thermal energy?