LS1.7 Quiz

During osmosis, water moves from...

• Water moves from High to low concentration

• Water moves from Low to high concentration

• Solute moves from high to low concentration

• Solute moves from low to high concentration

Facilitated diffusion involves the help of proteins to move molecules across the plasma membrane without energy.

• True

• False

A teacher is sweaty because it is hot in a room. The Smell of her BO drifts to the students all the way in the back of the class. What is this movement of BO molecules from high to low concentration called?

• Diffusion

• Facilitated Diffusion

• Osmosis

• Endocytosis

A cell with 80% salt concentration is put in a solution with 20% salt concentration. What would you expect to happen to the cell?

• Water would rush into the cell and it will swell

• Water would rush out of the cell and it would shrink

• Water would move in and out of the cell and it would stay the same

A cell with 6% solute concentration is placed in a beaker with 1% solute concentration. Is this a hypertonic, hypotonic, or isotonic solution?

• Hypotonic

• Hypertonic

• Isotonic

Drinking sea water is bad. Why?

• Water will flow into the cells and cells will expand in the hypertonic solution

• Water will flow out of the cells and cells will shrink in a hypertonic solution

• Water will flow into the cells and cells will expand in the hypotonic solution

• Water will flow out of the cells and cells will shrink in a hypotonic solution

A potato is placed in a beaker of pure (distilled) water. Is the environment hypertonic, hypotonic, or isotonic?

• hypotonic

• hypertonic

• isotonic

Facilitated Diffusion uses energy

• True

• False

What part of the plasma membrane makes it difficult for water-soluble substances to move freely in and out of the cell?

• Membrane Proteins

• Transport Proteins

• Fatty acid tails

• Phosphate heads

In osmosis, water always moves towards the _________ solution with the highest solute concentration.

• hypotonic

• isotonic

• hypertonic