Cell transport and Tonicity Knowledge Check

The diffusion of WATER across a semi-permeable membrane is

• Osmosis

• Diffusion

• Endocytosis

• Exocytosis

A cell will _____​ (a)   ___ in a hypertonic solution.​

• Shrink
• Swell
• Stay the same

Another term for equilibrium is...

• Not enough

• Too much

• Homeostasis

• Too little

Active transport requires __​ (a)   ____, moves materials from _____​ (b)   _____, and goes ____​ (c)   ___ the concentration gradient.

• ATP
• low to high
• against
• with
• no energy
• no ATP
• high to low

An individual who participates in a long-distance run on a hot day will produce large quantities of sweat. As a result of the excessive sweating, the amount of urine produced by the kidneys will change.

How will the kidneys respond to help the individual’s body maintain homeostasis?

• The kidneys will decrease urine production so the body can maintain blood pH.

• The kidneys will increase urine production to eliminate excess salt in the body.

• The kidneys will decrease urine production to allow the body to conserve water.

• The kidneys will increase urine production so the body can absorb more nutrients.

Give two differences between a hypertonic solution and a hypotonic solution.

Tags

NGSS.MS-LS1-2

Will H2O move in or out of the cell? Draw an arrow to show which direction the water will flow in this hypertonic solution.

How does a cell maintain homeostasis?

• Regulates what enters and leaves the cell

• Flexibility

• Protective barrier

• Structure and support

Tags

NGSS.MS-LS1-2

If there is 5 percent water inside a cell and 5 percent water outside a cell,

• more water will move into the cell the cell is in a hypotonic situation

• There will be no net movement of water into or out of cells - the cell is in an isotonic situation

• more water will move out of the cell the cell is in a hypertonic situation

Draw an example of a cell in an ISOTONIC solution. Include the container, water, solutes, cell, percentage, and draw arrows to show the water flow.