Biology Assignment
Question 1 3 pts
Scenario 1: A cell has an internal concentration of NaCI of 300 mOsm. The external solution has a concentration 200 mOsm of NaCI and 100 mOsm of KCI.
Match the concentration for each listed ion.
Internal Na+ Internal K+ Internal Cl-External Na+ External K+ External Cl-
[ Choose ] [ Choose ] [ Choose ] [ Choose I [ Choose ] [ Choose ]
Question 2 1.5 pts
For Scenario 1, Determine if the external concentration is higher/equal/lower than the internal solution.
Na+ K+ Cl-
[ Choose ] [ Choose [ Choose ]
Question 3 1.5 pts
For Scenario 1, Label the tonicity for each external ion concentration listed as hypotonic, isotonic, or hypertonic.
Na+ K+ Cl-
[ Choose ] [ Choose ] [ Choose ]
Question 4 3 pts
For Scenario 1, What is the external osmolarity (hypoosmotic, isosmotic, hyperosmotic)?
the external solution is hyper-osmotic because it has more solutes in it than the internal solution does
the external solution is hyperosmotic because it has less solutes in it than the internal solution does
the external solution is hypo-osmotic because it has more solutes in it than the internal solution does
the external solution is isosmotic because the internal and external solutions have the same amount of solutes in them.
Question 5 2 pts
Scenario 2: For the cell diagramed below, Label the tonicity for each external ion concentration listed as hypotonic, isotonic, or hypertonic.
Na+ K+ Ca2+ Cl-
[ Choose ] [ Choose [ Choose ] [ Choose ]
200 mOsm KCI 500 mOsm NaCI 100 mOsm CaCI
Question 6 3 pts
For Scenario 2: What is the external osmolarity (hypoosmotic, isosmotic, hyperosmotic)?
the external solution is isosmotic because the internal and external solutions have the same amount of solutes in them.
the external solution is hyperosmotic because it has more solutes in it than the internal solution does
the external solution is hypo-osmotic because it has more solutes in it than the internal solution does
the external solution is hyperosmotic because it has less solutes in it than the internal solution does
Question 7 2 pts
For Scenario 2: Assuming all ions are freely permeable to the membrane, based on concentration alone, determine if each ion would move into, out of, or not at all for the cell.
Na+ K+ Ca2+ Cl-
[ Choose [ Choose ] [ Choose ] [ Choose ]
Question 8 3 pts
For Scenario 2: Assuming water is freely permeable to the membrane, which direction would water move?
water would move out of the cell because there is a larger concentration of solutes outside the cell and thus a lower concentration of water.
water would move out of the cell because there is a larger concentration of solutes outside the cell and thus a higher concentration of water.
water would move into the cell because there is a larger concentration of solutes outside the cell and thus a lower concentration of water. 0 there would be no net movement of water 0 water would move into the cell because there is a larger concentration of solutes outside the cell and thus a higher concentration of water.
Question 9 1 pts
What would happen to you if you drank ocean water? (select all that apply)
you would become dehydrated 0 there will be no effect on your body 0 red blood cells will shrivel 0 red blood cells will swell and possibly burst
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