1. Osmosis This quiz will require you to apply concepts from osmosis. Click here to see the instructions

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4. Random movement of molecules from a high concentration to a low one The number of molecules dissolved in a solvent The number of solvent molecules The force that maintains blood pressure The force that maintains blood glucose concentrations Movement of water across a semipermeable membrane Osmosis is:

5. Osmolarity is: The concentration of solvents in a solution The concentration of solutes in a solution The concentration of salts in a solution The movement of water across a semipermeable membrane The concentration of proteins in a solution The concentration of water in a solution

6. When you add solutes to a solution, its osmolarity will: Not change Increase DecreaseGo to zero Decrease and then increase Increase and then decrease

7. A hyperosmolar solution: Has a higher volume Has a lower volume Has a lower osmotic pressure Has more water molecules has more solute molecules Has fewer solute molecules

8. A hypoosmolar solution: Has a higher osmotic pressure Is more concentrated Has a lower volume Has fewer solute molecules Has more solute molecules Has fewer water molecules

9. A hypotonic solution: Contains fewer solutes than human cells Will make cells placed in it shrink Contains solutes that can diffuse into cells Stimulates thirst Is the same composition as human cells Contains more solutes than human cells

10. A cell placed in a hypertonic solution will: Swell Lose solutes to the solution Become more permeable Become less permeable Pick up water from the solution Shrink

11. A cell placed in a hypotonic solution will: Swell Release water to the solution Create more solutes to balance itself Shrink Become dormant Pick up solutes from the solution

12. A man ate a big bag of salty chips. How did they affect the osmolarity of his stomach contents? Decreased it Increased it They decreased it because they reacted with solutes in his stomach There was no effect because the stomach already contains lots of solutes The Na+ and Cl- cancelled each other out, so it didn’t change Didn’t change it

13. When gut contents are hyperosmolar to blood, water moves: From the stomach into the duodenum From the gut contents into the blood There is no net water movement From the blood into the lungs From the blood into the guts From the cells into the blood

14. When solute molecules are absorbed from the gut contents into the blood, water: Will move from the blood into the gut contents Will remain in the gut contents Will bind to the solutes Will move into and out of the gut contents at the same rate Will follow them by osmosis Will not be affected

15. A man drank 6 liters of water. It entered his blood and made it: Isotonic A higher osmotic pressure HypotonicLess dilute Hypertonic Hyperosmolar

16. When the blood is hypoosmolar, water will: Move both in and out of the cells at the same rate Bind to the solutes in the blood Be lost in the sweat Move from the blood into the cells Not be affected Move from the cells into the blood

17. A person who had hypoosmolar blood might develop: Thirst Weight lossSwelling (edema) A dry mouth Low urine output Shrunken cells

18. The blood contains proteins. How will their presence affect its osmolarity? They will have no effect because proteins are not solutes Decrease it They will have no effect because they have a negative charge They will diffuse into the cells and increase cell osmolarity Increase it They will have no effect because they can’t diffuse into the cells

19. If a man’s liver stops making plasma proteins, his blood will become: Hypertonic Higher osmotic pressureIsosmotic Isotonic Hypotonic Hyperosmotic

20. The man with liver failure might develop: Dry mucus membranes Sunken eyes Low body temperatureCerebral edema Constipation Dehydration

21. A man has hypertonic blood. What will happen to his brain cells? They will swell They will make him crave salt They will self-destruct Nothing They will shrink They will not change size

22. What will the man’s brain tell him to do, if his blood is hypertonic? Eat salt Increase respiration rateRaise body temperature Lower blood pressure Drink Lower body temperature

23. How will the brain cells know then the blood is back to normal? His peripheral nerves will tell them he drank They will stop shrinking His heart will register an increased blood volume His kidneys will register a fluid increase His gut will register that he drank They will begin metabolism

24. Antidiuretic hormone reabsorbs water from the urine to the blood. When should your brain produce it? When brain cells are shrinking When blood is hypotonic When blood volume is high When blood is isotonic When cells are hypertonic When brain cells are swelling

25. A man makes too much antidiuretic hormone. What will happen to him? Hypotonic blood Low blood volume Increased urine outputHypotonic cells Cells will shrink Hypertonic blood