Unit 1 HW #4 (Molecular Movement Review)

Diffusion is a type of _______ transport.

Osmosis is the _________ of water.

Active transport is the movement of molecules from high to low requiring ___.

When we eat food containing starch (potato, rice, bread, vegetables, wheat, etc) it is broken down into smaller molecules (micromolecules) called ... (there is more than 1 answer)

• simple sugars

• glucose

• monosaccharides

• proteins

• energy

Gasses in our lungs exchange from higher to lower concentration. This process does not need energy. This process is called

• Active Transport

• Diffusion

• Osmosis

Nutrient molecules absorb into our bloodstream through diffusion at what location?

• mouth

• lungs

• small intestine

• stomach

The diagram below represents one of many microscopic air sacs in a human lung. The alveolus (air sac) is the place where oxygen (O2) and carbon dioxide (CO2) move into or out of the blood, as represented in the diagram. Which statement best explains why these gases are able to move in the directions shown in the

diagram?

• A. The CO2 moves out of the capillary and into

  the alveolus to make more room for the blood

  to carry O2.

• B. The O2 is needed by the cells, so it is

  actively transported into the blood. The CO2,

  which is not needed, is actively transported

  out of the blood.

• C. The blood coming to the lungs is low in CO2

  and high in O2, so the gases each diffuse

  from a lower to a higher concentration in this area.

• D. The blood coming to the lungs is high in CO2

  and low in O2, so the gases each diffuse from a higher to a lower concentration in this area.

The diagram represents a model cell setup. The locations of three different substances are indicated in the diagram. Which molecules are able to diffuse in and out of the cell?

• Starch Indicator and Glucose

• Glucose only

• Starch only

• Starch and Starch Indicator

Which of the following correctly identifies the unknown liquid with the best supporting evidence?

• The unknown liquid is glucose because the color changed.

• The unknown liquid is starch because the color did not change.

• The unknown liquid is glucose because the color did not change.

• The unknown liquid is starch because the color changed from amber to blue-black.

Identify the structure in the cell that will produce ATP from the starch building blocks

• Nucleus

• Mitochondria

• Vacuole

• Cell membrane