Bio U3 Homeostasis Retest Review

Which of the following is NOT a form of passive transport?

• facilitated diffusion
• diffusion
• endocytosis

If a cell were placed in salt water, water exits the cell as a result of which process?

• facilitated diffusion
• active transport
•  osmosis

What cell process is responsible for the effect shown in the image?

• facilitated diffusion
• passive transport
• active transport

The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?

• lipids
• bilipids
• proteins

A cell will shrink when it is placed in a (an)

• hypotonic solution
• hypertonic solution
• isotonic solution

As a result of diffusion, the concentration of many types of substances 

• always remains greater outside the membrane
• becomes imbalanced on both sides of a membrane
• eventually becomes balanced on both sides of a membrane

Phospholipids are molecules that

• contain phosphate
• have nonpolar "tails" and polar "heads"
• form the lipid bilayer of the cell membrane
• all of these

The 5% salt solution pictured could be described as a/an

• isotonic solution
•  hypertonic solution
•  hypotonic solution

What is going to happen in the scenario pictured?

• water will move out of the cell, causing it to shrink
• water will move into the cell, causing it to swell
• solutes will enter the cell, causing it to swell

Which of the following statements describes the organic compound above?

• the "A" end is polar
• it makes the cell membrane selectively permeable
• the "B" end is nonpolar
• all of these