7.LS1.2--Cell Transport

Multiple Choice

This lab experiment will model _________

• Active Transport across the plasma membrane

• Diffusion across semipermeable membrane

• Endocytosis

• Phagocytosis

Multiple Choice

The starch and water solution represents the___________. The

plastic bag will be the ___________ in this lab.

• outside of the cell;

  cell membrane

• blood stream;

  cell membrane

• corn syrup solution;

  cell membrane

• inside of the cell;

  cell membrane

Multiple Choice

During osmosis

• water moves from high to low concentration
• large or oddly shaped molecules move across a cell membrane
• water moves when energy is used
• proteins are built

Multiple Choice

What happens during osmosis?

• Transfer of energy from one place to another
• Movement of small molecules from high concentration to low concentration

• Movement of water molecules from an area of high water concentration to an area of low water concentration

• Process of breaking down food into simpler substances

Multiple Choice

Permeable means

• things can pass through
• the concentration levels are different
• it is permanent
• things are stuck

Multiple Choice

The diffusion of water through a semi-permeable membrane is called?

• Osmosis
• Cell wall
• Diffusion
• Respiration

Multiple Choice

When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of

• Osmosis
• Diffusion
• Equilibrium

Multiple Choice

If there is 5 percent water inside a cell and 5 percent water outside a cell

• more water will move inside the cell
• more water will move outside the cell
• There will be no movement of water cells

Multiple Choice

A person should never drink salty water because their cells would

• shrink
• expand

Multiple Choice

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

Multiple Choice

A semipermeable membrane allows water to pass through it, but it does not allow larger particles such as sugar to pass. If a large amount of sugar was added (as shown on the left), what would happen to the water levels in the U tube?

• Equilibrium would occur with both sides level

• More water would go to the right side of the tube away from the sugar

• More water would go to the left side of the tube toward the sugar

Multiple Choice

A semipermeable membrane is_______.

• fully permeable
• impermeable
• selectively permeable

Multiple Choice

The iodine and starch will not have a reaction unless _________.

• the bag is leaking

  starch water solution into the iodine

• the bag is

  permeable and

  iodine molecules pass through

• the bag does not act as a semi permeable membrane

Explanation Slide...

Purple is on the inside of the bag and there is none in the iodine. The iodine crossed the semipermeable bag. No starch passed into the iodine because the molecules were too large. The bag was semipermeable by only letting the iodine through.

Multiple Choice

The cell model that is _________ shows that ______________.

Think closely before you choose your answer.

• white

  starch molecules leaked into

  the iodine

• purple

  iodine molecules leaked into the starch

• purple

  starch molecules leaked into

  the iodine

• white

  iodine molecules leaked into the starch

Multiple Choice

This lab is a "model" that symbolizes which of the following parts of a cell?

• DNA replication before cell division

• Splitting of the

  Nuclear Membrane

• Diffusion across the Cell Membrane

• ATP Synthesis in the mitochondria