Diffusion and Selectively Permeable Membrane

This cell was placed into which type of solution?

• Hypertonic 
• Hypotonic 
• Isotonic 
• Cannot determine

Tags

NGSS.HS-LS1-3

The diffusion of water through a selectively permeable membrane is called osmosis. Which description represents the effects of osmosis on a plant cell when the concentration of sugar particles is greater inside the cell than outside?

• Water diffuses into the cell, and the cell swells.

• Water diffuses out of the cell, and the cell shrinks.

• Water moves into and out of the cell at equal rates, and cell sie remains the same.

• Water is blocked from moving into or out of the cell, and cell size remains the same.

Which BEST explains why using a HYPERTONIC solution helps reduce swelling?

• A hypertonic solution has an EQUAL water concentration than the cells, making the water move IN and OUT of the cells EQUALLY.

• A hypertonic solution has a HIGHER water concentration than the cells, making the water move INTO of the cells.

• A hypertonic solution has a LOWER water concentration than the cells, making the water move OUT of the cells.

• Huh?

Tags

NGSS.HS-LS1-3

Cell membranes use proteins to help move large or polar molecules from the outside-in or inside-out. What is this type of movement across the membrane called?

• active transport

• passive transport

Tags

NGSS.HS-LS2-3

Water in the cell flows in equal amounts when the salt concentration on both sides of the cell membrane matches, at 0.9% salt. If the amount of salt decreases on the outside of the cell, how will the situation change?

• Water will rush to outside of the cell membrane, causing the cell itself to grow.

• Water will rush to outside of the cell membrane, causing the cell itself to shrink.

• Water will rush to inside of the cell membrane, causing the cell itself to grow.

• Water will rush to inside of the cell membrane, causing the cell itself to shrink.

Tags

NGSS.HS-LS1-3

Endocytosis is defined as

• the movement of large molecules from the inside of the cell to the outisde of the cell using channel proteins. 
• the movement of large molecules from the inside of the cell to the outisde of the cell membrane vesciles. 
•  the movement of large molecules from the outside of the cell to the inside of the cell using membrane vesciles.
• the movement of large molecules from the outside of the cell to the inside of the cell using channel proteins.