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Osmosis
Diffusion
Cell Membrane
Active Transport
Enzymes
100
Osmosis is the movement of water from a ____________ to a lower concentration.
What is higher
100

In diffusion molecules do this.

Move from high to low concentration

100

Which living organisms have a cell membrane?

all

100

Define active transport

movement of a molecule against a concentration gradient with use of ATP for energy

100

What are enzymes

proteins that speed up chemical reactions

200
A solution that causes a cell to swell.
What is hypotonic
200
Amount of substance in a certain place.
What is concentration
200
The cell membrane is ___________ permeable
What is selectively or Semi
200

transport method where small molecules transported through proteins in the cell membrane

protein pumps

200

What is a chemical reaction? What does it require

changing substances by breaking and forming bonds (includes hydrolysis and dehydration reactions) requires energy to occur

300
A solution that shrinks is.
What is hypertonic.
300
Facilitated diffusion requires ATP. True or false?

False

300

The cell membrane is made up of a fluid ___________ bilayer.

What is lipid or phospholipid.

300

transport method where large molecules are transported by way of vesicles

bulk transport

300

What is a reactant

the substances changed during a chemical reaction (goes into the process)

400

A solution with 1.5% saline would be considered this if the cell has .6% saline.

What is hypertonic.

400

Oxygen molecules move across the cell membrane via

What is simple diffusion.

400

The head of the phospholipid is hydrophilic and the tail is hydrophobic. This means what?

What is the head attracts water and tail repels water.

400

define exocytosis

contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane with the cell membrane

400

Enzymes are _____, meaning they ______ up reactions by reducing the __________ required to start the reaction

catalysts, speed, activation energy

500
All animals need cells that are this to survive.
What is isotonic.
500

Facilitated diffusion requires what kind of protein?

Channel protein

500
What type of the cell membrane acts like a "tunnel" to allow certain things to go in and out of the cell?
What is a protein channel or protein.
500

defin endocytosis

the taking in of matter by a living cell by invagination of its membrane to form a vacuole.

500

What is denaturation?

When environmental conditions cause the enzyme to lose its shape and no longer work.

  • temperature or pH cause this