Lecture 11: Cell Transport (English Sub)

Biology: Cell Transport Lecture (English)

Multiple Choice

Concentration gradients move things from

• high to low density

• from low to high density

Multiple Choice

Which direction will the concentration gradient in this picture flow for molecule x?

• to the right

• to the left

Multiple Choice

How is a gradient's strength decreased?

• by allowing molecules to flow with it

• by moving molecules against it

Multiple Choice

How is a gradients strength increased?

• moving molecules against a gradient

• moving molecules with a gradient

Multiple Choice

The purple molecule wants to move

• into the cell

• out of the cell

Multiple Choice

Which molecule is being moved through the cell by facilitated diffusion?

• green

• blue

Multiple Choice

The blue molecule is moving through the membrane through

• active transport

• facilitated diffusion

• simple diffusion

Multiple Choice

Both types of transport shown

• require cellular energy

• do not require cellular energy

Fill in the Blanks

Fill in the Blanks

Multiple Choice

Using receptors to take in materials

• endocytosis

• exocytosis

Fill in the Blanks

Multiple Choice

Cells placed in salt water

• A

• B

• C

Multiple Choice

(S stands for solute) Osmotic flow is

• into the cell

• out of the cell

Multiple Choice

In order to be in homeostasis, cells must regulate solute concentrations inside their cells for proper osmotic flow. This concentration is most easily achieved in

• hypertonic environments

• hypotonic environments

• isotonic environments