Ecology 1C-1D Formative

When does diffusion in cells stop?

• When vesicles burst.
• When equilibrium is reached.
• When respiration begins.
• When photosynthesis begins.

Tags

1D

In passive transport, molecules move from an area of __________ concentration to an area of __________ concentration.

• high, low

• low, high

• water, salt

• active, passive

Tags

1C

Which type of transport requires energy input?

• Passive Transport

• Osmosis

• Simple Diffusion

• Active Transport

Tags

1C

_______ regulates what enters and leaves a cell.

• Cell Membrane

• Nucleus

• Mitochondria

• Cytoplasm

Tags

1C

Which type of passive transport uses proteins to help molecules pass through the membrane?

• Simple Diffusion

• Facilitated Diffusion

• Osmosis

• All of the above

Tags

1D

Cell membranes are described as selectively permeable.

Four students were asked to explain what this means. Which one is correct?

• Student 1: Cell membranes prevent all materials from entering the cell.

• Student 2: Cell membranes only provide structural support for the cell.

• Student 3: Cell membranes regulate which substances can enter and exit the cell.

• Student 4: Cell membranes allow water and water-soluble substances to enter the cell.

Tags

1C

Passive Transport

• Requires cell energy

• Does not require cell energy

Tags

1C

What is diffusion?

• When molecules move from a low concentration to a high concentration.

• When molecules move from a high concentration to a low concentration.

• No movement.

• Molecules move everywhere.

Tags

1D

Susan sprayed perfume in one corner of the room. John, who sits across the room and is allergic to perfume, soon begins to sneeze. Perfume travels across the room by -

• Active transport.

• Osmosis.

• Endocytosis.

• Diffusion.

Tags

1D

Where is there a low concentration of dye?

• at the bottom of cup
• in the color
• at the top of cup 
• no concenteraion gradient

Tags

1D