Question 1

Carbamazepine is an antiepileptic. A typical daily dose is 1.1

Accepted Answer

Carbamazepine is usually taken orally in tablet or liquid form. The typical daily dose of 1.1 refers to the number of milligrams (mg) to be taken per day. The answer choice in milliliters (mL) indicates a liquid medication, which is not specified in the question. Therefore, the best choice is B, which is the only answer option in mg, and corresponds to a daily dose of 1100 mg (1.1 x 1000).

Question 2

How many grams of glucose should be weighed out to make 1 liter of a rehydration solution that contains 75 mmol of glucose (the molar mass of glucose is 180 g)?

Accepted Answer

To find the grams of glucose needed, use the formula: grams = moles × molar mass. For 75 mmol (0.075 mol) of glucose, the calculation is 0.075 mol × 180 g/mol = 13.5 g, which rounds to 14 g.

Question 3

An order is given to administer 50. mg of furosemide, a diuretic, over the course of 2 hours by IV. If a 500. mL bag contains 200. mg of furosemide, what volume of solution does the patient need to receive over the course of two hours?

Accepted Answer

To find the volume of solution needed, we can use the formula:

Dose (mg) = (Volume (mL) x Concentration (mg/mL)) / Time (h)

Rearranging this formula to solve for volume, we get:

Volume (mL) = Dose (mg) x Time (h) / Concentration (mg/mL)

Plugging in the given values, we get:

Volume (mL) = 50. mg x 2 h / 200. mg/500. mL = 0.5 mL x 2 = 1 mL

Therefore, the patient needs to receive 1 mL of solution over the course of two hours. However, this answer is not one of the options provided. To find the closest answer, we can round up to the nearest 10 mL increment, since that is the level of precision provided by the answer choices. Rounding up gives us 10 times the calculated volume, which is:

Volume (mL) = 10 x 1 = 10 mL

The nearest answer choice to 10 mL is C, which is 130 mL. However, that is not the correct answer. Therefore, there is no exact match among the answer choices, but the closest one is C.

Question 4

Which of the following compounds passes most easily through the cell membrane?

Accepted Answer

Oxygen (O₂) is a small, nonpolar molecule that can easily diffuse through the lipid bilayer of the cell membrane without the need for transport proteins.

Question 5

Cephadrine is one of many antibiotics that act by inhibiting bacterial cell wall synthesis. If a typical daily dosage is 660 mg, how many milliliters of 75 mg/mL suspension of cephadrine should be administered daily?

Accepted Answer

To find how many milliliters of suspension should be administered daily, we need to divide the total daily dosage (660 mg) by the concentration of the suspension (75 mg/mL):

660 mg / 75 mg/mL = 8.8 mL

Therefore, the best choice is D.

Question 6

If the semipermeable membrane only allows the passage of water, what process will to occur?

Accepted Answer

If the semipermeable membrane only allows the passage of water, then the process that will occur is osmosis, which is the movement of water molecules from an area of high water concentration to an area of low water concentration through a semipermeable membrane. This process is essential for many biological and physiological processes.

Question 7

Which of the following statements describes one way in which osmosis and dialysis are similar?

Accepted Answer

Both osmosis and dialysis involve the movement of molecules from an area of high concentration to an area of low concentration through a semipermeable membrane.

Question 8

Consider solutions A and B separated by a semipermeable membrane. Which diagram best illustrates what the volumes should look like after osmosis occurs?

Accepted Answer

The answer of Consider solutions A and B separated by...

Question 9

It is normal to have about 100 mM (mmol/L) of chloride (Cl ^- ) in the blood. How many meq is this?

Accepted Answer

To convert from mM to meq/L for chloride, we use the factor 1 meq = 35.5 mg of chloride. Therefore, 100 mM of chloride is equal to 100 mmol/L x 35.5 mg/mmol / 1000 mg/g / 1 meq = 3.55 meq/L, which is closest to answer B of 100 meq.

Question 10

If A contains 6% NaCl in water and B contains 3% NaCl in water, which of the following will occur?

Accepted Answer

Water always flows from a lower solute concentration to a higher solute concentration. Therefore, water will flow from B (3% NaCl) to A (6% NaCl) in order to balance the concentration of NaCl between the two solutions. No NaCl will flow between the solutions.

Question 11

In the following diagram, A is ______ and B is ______.

Accepted Answer

The answer of In the following diagram, A is ______...

Question 12

A child is given 7.5 mL of a liquid pain reliever as a suspension containing 160 mg/5 mL of the pain reliever. How many milligrams of the pain reliever did the child receive?

Accepted Answer

The child received 240 mg of the pain reliever. This is calculated by setting up a proportion based on the concentration of the pain reliever (160 mg per 5 mL) and the amount given (7.5 mL): (160 mg / 5 mL) = (x mg / 7.5 mL), solving for x gives 240 mg.

Question 13

A student adds 0.250 L of 200 mM buffer stock solution to a volumetric flask and dilutes the stock to 1.0 L. What is the final concentration of the solution?

Accepted Answer

To calculate the final concentration of the solution, we need to use the formula:

C1V1 = C2V2

where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

We know that:
- C1 = 200 mM
- V1 = 0.250 L
- V2 = 1.0 L

Plugging these values into the formula and solving for C2:

200 mM x 0.250 L = C2 x 1.0 L
50 mmol = C2

Therefore, the final concentration of the solution is 50 mmol, which is equivalent to 11 mmol/L (millimoles per liter). So the correct answer is C.

Question 14

An order is given to administer 100. mg of furosemide, a diuretic, over the course of 4 hours by IV. If a 500. mL bag contains 200. mg of furosemide, what flow rate, in mL per hour, should be administered to the patient?

Accepted Answer

To administer 100 mg of furosemide over 4 hours, the rate should be 100/4 = 25 mg/hour.

Each 500 mL bag contains 200 mg of furosemide. To administer 100 mg of furosemide, we need 100/200 = 0.5 of the bag.

To administer 0.5 of the 500 mL bag over 4 hours, we need a flow rate of 500 mL x 0.5 / 4 hours = 63 mL/hour.

Therefore, the correct answer is C.

Question 15

Which of the following statements describes one way in which osmosis and dialysis are different?

Accepted Answer

Osmosis is the movement of solvent (usually water) from an area of low solute concentration to an area of high solute concentration, while dialysis refers to the separation of small solutes from larger ones by passing a solution through a semipermeable membrane. Therefore, option C correctly describes the difference between osmosis and dialysis.

Question 16

A biologist needs 500 mL of a 10 mM phosphate buffer. The stock solution of the buffer is 100 mM. How much stock solution should be used to make the 10 mM phosphate buffer?

Accepted Answer

The concentration of the stock solution is 100 mM and the desired concentration is 10 mM.

We can use the formula:

C1V1 = C2V2

Where: 
C1 = concentration of stock solution
V1 = volume of stock solution needed
C2 = desired concentration
V2 = final volume

Plugging in the numbers,

100 mM x V1 = 10 mM x 500 mL

V1 = (10 mM x 500 mL)/100 mM = 50 mL

Therefore, 50 mL of the stock solution should be used to make 500 mL of the 10 mM phosphate buffer.

Question 17

If A contains 3 mmol NaCl and 3 mmol glucose, while B contains 6 mmol NaCl, which of the following will occur?

Accepted Answer

The answer of If A contains 3 mmol NaCl and...

Question 18

The cell membrane separates the interior of the cell from its surroundings, but it does allow the passage of some small molecules from regions of higher concentration to regions of lower concentration. This process is called

Accepted Answer

Simple diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration, across a selectively permeable membrane like the cell membrane. Osmosis is the diffusion of water across the membrane, but it implies the movement of water only, not other small molecules. Dialysis is a process of separating molecules based on their size through a selectively permeable membrane. Dissolution refers to the process of dissolving a solute in a solvent to form a homogeneous mixture. Active transport requires energy input from the cell to move molecules against their concentration gradient.

Question 19

Convert 0.015 M Ca²⁺ to equivalents of Ca²⁺.

Accepted Answer

Molarity (M) is defined as the number of moles of solute per liter of solution. To convert to equivalents, we need to multiply by the number of ions per molecule. Ca²⁺ has a total of 15 ions: - 1 Ca2+ ion - 1 S2- ion - 12 HPO42- ions - 1 SO42- ion Therefore, to convert the molarity to equivalents, we need to multiply by 15: 0.015 M Ca²⁺ x 15 equivalents/molecule = 0.225 equivalents However, since we are looking for the equivalents of Ca²⁺ only, we need to adjust for the fact that there is only one molecule of it in the solution. So, the final answer is: 0.225 equivalents / 1 molecule = 0.225 equivalents/molecule = 0.030 equivalents Therefore, the correct choice is C.

Question 20

How many moles of glucose are in 0.82 L of a 0.13 M glucose solution?

Accepted Answer

The answer of How many moles of glucose are in...

Quiz 8: Solutions, Colloids and Membranes

Carbamazepine is an antiepileptic. A typical daily dose is 1.1

How many grams of glucose should be weighed out to make 1 liter of a rehydration solution that contains 75 mmol of glucose (the molar mass of glucose is 180 g) ?

An order is given to administer 50. mg of furosemide, a diuretic, over the course of 2 hours by IV. If a 500. mL bag contains 200. mg of furosemide, what volume of solution does the patient need to receive over the course of two hours?

Which of the following compounds passes most easily through the cell membrane?

Cephadrine is one of many antibiotics that act by inhibiting bacterial cell wall synthesis. If a typical daily dosage is 660 mg, how many milliliters of 75 mg/mL suspension of cephadrine should be administered daily?

If the semipermeable membrane only allows the passage of water, what process will to occur?

Which of the following statements describes one way in which osmosis and dialysis are similar?

Consider solutions A and B separated by a semipermeable membrane. Which diagram best illustrates what the volumes should look like after osmosis occurs?

It is normal to have about 100 mM (mmol/L) of chloride (Cl ^- ) in the blood. How many meq is this?

If A contains 6% NaCl in water and B contains 3% NaCl in water, which of the following will occur?

In the following diagram, A is and B is .

A child is given 7.5 mL of a liquid pain reliever as a suspension containing 160 mg/5 mL of the pain reliever. How many milligrams of the pain reliever did the child receive?

A student adds 0.250 L of 200 mM buffer stock solution to a volumetric flask and dilutes the stock to 1.0 L. What is the final concentration of the solution?

An order is given to administer 100. mg of furosemide, a diuretic, over the course of 4 hours by IV. If a 500. mL bag contains 200. mg of furosemide, what flow rate, in mL per hour, should be administered to the patient?

Which of the following statements describes one way in which osmosis and dialysis are different?

A biologist needs 500 mL of a 10 mM phosphate buffer. The stock solution of the buffer is 100 mM. How much stock solution should be used to make the 10 mM phosphate buffer?

If A contains 3 mmol NaCl and 3 mmol glucose, while B contains 6 mmol NaCl, which of the following will occur?

The cell membrane separates the interior of the cell from its surroundings, but it does allow the passage of some small molecules from regions of higher concentration to regions of lower concentration. This process is called

Convert 0.015 M Ca²⁺ to equivalents of Ca²⁺.

How many moles of glucose are in 0.82 L of a 0.13 M glucose solution?

Quiz 8: Solutions, Colloids and Membranes

Carbamazepine is an antiepileptic. A typical daily dose is 1.1

How many grams of glucose should be weighed out to make 1 liter of a rehydration solution that contains 75 mmol of glucose (the molar mass of glucose is 180 g) ?

An order is given to administer 50. mg of furosemide, a diuretic, over the course of 2 hours by IV. If a 500. mL bag contains 200. mg of furosemide, what volume of solution does the patient need to receive over the course of two hours?

Which of the following compounds passes most easily through the cell membrane?

Cephadrine is one of many antibiotics that act by inhibiting bacterial cell wall synthesis. If a typical daily dosage is 660 mg, how many milliliters of 75 mg/mL suspension of cephadrine should be administered daily?

If the semipermeable membrane only allows the passage of water, what process will to occur?

Which of the following statements describes one way in which osmosis and dialysis are similar?

Consider solutions A and B separated by a semipermeable membrane. Which diagram best illustrates what the volumes should look like after osmosis occurs?

It is normal to have about 100 mM (mmol/L) of chloride (Cl - ) in the blood. How many meq is this?

If A contains 6% NaCl in water and B contains 3% NaCl in water, which of the following will occur?

In the following diagram, A is ______ and B is ______.

A child is given 7.5 mL of a liquid pain reliever as a suspension containing 160 mg/5 mL of the pain reliever. How many milligrams of the pain reliever did the child receive?

A student adds 0.250 L of 200 mM buffer stock solution to a volumetric flask and dilutes the stock to 1.0 L. What is the final concentration of the solution?

An order is given to administer 100. mg of furosemide, a diuretic, over the course of 4 hours by IV. If a 500. mL bag contains 200. mg of furosemide, what flow rate, in mL per hour, should be administered to the patient?

Which of the following statements describes one way in which osmosis and dialysis are different?

A biologist needs 500 mL of a 10 mM phosphate buffer. The stock solution of the buffer is 100 mM. How much stock solution should be used to make the 10 mM phosphate buffer?

If A contains 3 mmol NaCl and 3 mmol glucose, while B contains 6 mmol NaCl, which of the following will occur?

The cell membrane separates the interior of the cell from its surroundings, but it does allow the passage of some small molecules from regions of higher concentration to regions of lower concentration. This process is called

Convert 0.015 M Ca2+ to equivalents of Ca2+.

How many moles of glucose are in 0.82 L of a 0.13 M glucose solution?

It is normal to have about 100 mM (mmol/L) of chloride (Cl ^- ) in the blood. How many meq is this?

In the following diagram, A is and B is .

Convert 0.015 M Ca²⁺ to equivalents of Ca²⁺.