SFSU BIOL 212 Final Exam Actual Exam Newest

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SFSU BIOL 212 Final Exam Actual Exam Newest 2026-2027 Actual Exam With Complete 100 Questions And Correct Detailed Answers (Verified Answers) |Already Graded A+

When blood sugar is low, liver cells are able to convert glycogen to glucose, thereby making the intracellular glucose concentration higher than the extracellular glucose concentration. What would happen to the facilitated diffusion of glucose throughout the GLUT when this occurs?

• the movement of glucose will not change
• the movement of glucose will stop
• the movement of glucose will reverse directions, and the glucose will

leave the cell through the GLUT carriers - ANSWER-the movement of glucose will reverse directions, and the glucose will leave the cell through the GLUT carriers

Which of the following statements about the Na+/K+ pump is FALSE?

• three sodium ions are moved out of the cell per ATP

b) It is a form of active transport

• the pump is open to both the ECF and ICF simultaneously, to allow

both Na+ and K+ to move in their respective directions

• the pump has built in enzyme activity 1 / 4

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• it is present in the cell membrane of every cell of the human body -

ANSWER-the pump is open to both the ECF and ICF simultaneously, to allow both Na+ and K+ to move in their respective directions

The primary cation outside the cells is

• sodium
• chloride
• potassium
• calcium
• magnesium - ANSWER-sodium

Which of the following is FALSE about glucose uptake in the small intestine?

• glucose moves into the bloodstream by facilitated diffusion
• the movement of glucose across the luminal membrane is driven by

an ion concentration gradient

• the co-transport carrier relies on phosphorylation in order to increase

its affinity for glucose

• the sodium-potassium pump keeps the ICF Na+ concentration lower

than the luminal Na+ concentration - ANSWER-the co-transport carrier relies on phosphorylation in order to increase its affinity for glucose

A solution contains solutes to which the membrane is not permeable. If pure water and the solution are separated by a membrane: 2 / 4

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• water will diffuse by osmosis until the solute concentration in the two

compartments becomes equal

• both water and solute will diffuse across the membrane, down their

concentration gradients, until a state of equilibrium is established

• water will diffuse by osmosis until stopped by an opposing

hydrostatic pressure

• because of hydrostatic pressure from the pure water, no water will

move at all

• it is impossible to predict what will happen - ANSWER-water will

diffuse by osmosis until stopped by an opposing hydrostatic pressure

By definition, a solution is hypotonic to a human cell if:

• the concentration of all solutes contained in it is less than 300 mOsm
• the concentration of all membrane-permeant solutes contained in it is

less than 300 mOsm

• the concentration of all membrane-impermeant solutes contained in it

is less than 300 mOsm

• its osmolarity is less than 300 mOsm - ANSWER-the concentration of

all membrane-impermeant solutes contained in it is less than 300 mOsm

The atomic mass of calcium (Ca) is 40.0 and chloride (Cl) is 35.5. A young doctor needs to treat a patient with hypocalcemia (low blood calcium). The doctor gives the patient 0.9 M CaCl2. What approximate % solution is this?

• 0.1% 3 / 4

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• 6.8%
• 10%
• 0.7%
• 0.9% - ANSWER-10%

What is the osmolarity of this 0.9 M solution of CaCl2?

• 0.3 OsM
• 0.9 OsM
• 0.27 OsM
• 2.7 OsM
• 3.0 OsM - ANSWER-2.7 OsM

Assume that the cell membrane is not permeable to CaCl2 or its ions, what will happen to a RBC put into this solution?

a) The RBC will swell or lyse

b) The RBC will not change

c) The RBC will crenate - ANSWER-The RBC will crenate

GIVEN: The red blood cell membrane is impermeable to mannitol, but

is permeable to both water and glucose. Red blood cells will swell the

most when immersed in:

a) A hyper-osmotic glucose solution

• a hypo-osmotic glucose solution
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