Show:
Osmosis and Diffusion
Transport Mechanisms
The Cell Membrane
Passive vs Active
Cell Size
100
This organelle is involved in the transport of things in and out of the cell in osmosis and diffusion.
What is the cell membrane?
100

This type of passive transport moves small molecules across the membrane unassisted. 

What is simple diffusion?

100

This is another word for the composition or structure of the cell membrane.

What is a phospholipid bilayer?

100

Passive transport requires no energy to move molecules from an area of _______ concentration to an area of ________ concentration.

What is from high to low concentration?

100

Most cells are too small to see without this tool.

What is a microscope?

200
This process occurs when substances move in and out of the cell from areas of high concentration to areas of low concentration.
What is Diffusion?
200
The primary difference between passive transport and active transport is that active transport uses __________ while passive transport does not.
What is energy?
200

Since phospholipid tails of the phospholipid bilayer are ____________, the cell membrane is selectively permeable.

What is hydrophobic?

200

This type of protein opens and closes to allow molecules through the cell membrane by diffusion, without using any energy.

What is a gated channel?

200

A higher SA:V means faster movement of materials into and out of the cell by this general process.

What is diffusion?

300
This process occurs when water moves in and out of the cell.
What is Osmosis?
300

Molecules like Oxygen and Water can pass through the membrane using this type of transport.

What is simple diffusion?

300

This property of the cell membrane allows some substances to pass while blocking others.

What is selective (or semi) permeability?

300
Energy for the cell is produced in this organelle.
What is the mitochondrion?
300

Between a small cell and a large cell of the same shape, this one will exchange materials more efficiently.

What is a small cell?

400

When a cell is placed in a hypertonic solution, water moves in this direction across the cell membrane.

What is out of the cell?

400
When small particles enter the cell using a protein, but no energy, this type of transport mechanism is being used.
What is facilitated diffusion?
400

The __________ ___________ of the cell membrane are on the outside of the cell membrane, in contact with the cytoplasm and extracellular fluid.

What are the phospholipid (polar, hydrophilic) heads?

400
Passive Transport occurs ___________the concentration gradient.
What is with/along?
400

Small cells can move materials in and out more quickly because they have more of this compared to their volume.

What is surface area?

500

This is the difference in concentration across a membrane.

What is Concentration Gradient?

500

This cell transport process requires ATP because it moves materials against the concentration gradient.

What is active transport?

500

The state in which the distribution of a substance is even across the cell membrane.

What is equilibrium?

500

During active transport, cells use energy in the form of ATP, which gets used up and turned into _______.

What is ADP?

500

A high ____________ ratio allows for more efficient nutrient uptake and waste removal.  

What is Surface Area : Volume?