Unit 2 Transport

what applies to facilitated diffusion?

• move along the gradient, carrier proteins, passive transport, no ATP

• move along the gradient, carrier proteins, active transport, no ATP

• move along the gradient , carrier proteins, active transport, needs ATP

• move along the gradient, carrier proteins, passive transport, needs ATP

Which way does a substance move in the concentration gradient during active transport?

• high to low
• low to high
• no net movement

The total solute concentration of a red blood cell is about 2%. Sucrose cannot pass through a red blood cells membrane, but water and urea can. Osmosis will cause such a cell to shrink the most when the cell is immersed in which of the following solutions?

• A hypertonic sucrose solution

• A hypotonic sucrose solution

• A hypertonic urea solution

• A hypotonic urea solution

You decide to buy a new fish for your freshwater aquarium. When you introduce the fish into its new tank, the fish swells up and dies. You later learn that it was a fish from the ocean. Based on what you know of toxicity, the most likely explanation is that the unfortunate fish went from a(n) _______________ solution into a(n) _______________ solution.

• isotonic, hypotonic

• hypertonic, hypotonic

• hypotonic, hypertonic

• hypotonic, isotonic

Tags

NGSS.HS-LS1-3

• Passive Transport
• Active Transport

• Passive Transport
• Active Transport

Tags

NGSS.MS-LS1-2

• Passive Transport
• Active Transport

After examining this diagram showing the concentration of water inside and outside of the cell, identify the tonicity of the solution.

• isotonic

• hypotonic

• hypertonic

Tags

NGSS.MS-LS1-2

If the dots represent sugar what direction will the water flow?

• Into the cell

• Out of the cell

• Both equally (equilibrium)

Tags

NGSS.MS-LS1-2

What type of solution allows water to enter the plant cell?

• hypotonic solution
• hypertonic solution
• isotonic solution
• active transport

Tags

NGSS.MS-LS1-2