Osmosis

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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