Question 1

Which statement about gases dissolved in aqueous solutions is true?

Accepted Answer

Different gases have different solubilities due to their unique chemical properties and interactions with water molecules.

Question 2

Which scenarios will result in dissolved gas coming out of solution?
I. Collecting cold creek water, sealing the container, and allowing the solution to warm
II. Collecting warm water, sealing the container, and allowing the solution to cool
III. Collecting cold creek water, adding salt, sealing the container, and allowing the solution to warm
IV. Collecting cold creek water, adding salt, sealing the container, and keeping the solution at the original temperature

Accepted Answer

When the temperature of a solution increases, the solubility of gases in the solution decreases. This means that dissolved gases will come out of solution when the solution is warmed. Adding salt to a solution also decreases the solubility of gases in the solution. Therefore, scenarios I, III, and IV will all result in dissolved gas coming out of solution.

Question 3

If a water beetle has used up half of the oxygen in its air bubble, the concentration of oxygen in the bubble is _______ the concentration of oxygen in the water. The partial pressure of oxygen in the bubble is _______ the partial pressure of oxygen in the water. Therefore, oxygen will move from the _______.

Accepted Answer

The concentration of oxygen in the bubble is greater than the concentration of oxygen in the water because the beetle has used up half of the oxygen in the bubble. The partial pressure of oxygen in the bubble is less than the partial pressure of oxygen in the water because the concentration of oxygen in the bubble is less than the concentration of oxygen in the water. Therefore, oxygen will move from the water into the bubble.

Question 4

If a water beetle has been using an air bubble as a gill for 1 hour, the O₂ partial pressure will be _______ that of air and the N₂ partial pressure will be _______ that of air.

Accepted Answer

The O₂ partial pressure will be less than that of air because the beetle consumes oxygen from the bubble. The N₂ partial pressure will remain equal to that of air because nitrogen is not consumed and diffuses in and out of the bubble.

Question 5

In which situation would a water beetle's gas bubble last the shortest amount of time as a functional gill?

Accepted Answer

The gas bubble will lose oxygen quickly because the partial pressure of oxygen in the bubble is much higher than in the water, leading to rapid diffusion out of the bubble.

Question 6

Which statement regarding the diffusion of gases is false?

Accepted Answer

Gases always diffuse from areas of high partial pressure to areas of low partial pressure, not the other way around.

Question 7

In the diffusion equation, if the units of K are cm² ∙ s^-¹, which of the following best represents the units for J?

Accepted Answer

The units of J are the same as the units of K multiplied by the units of concentration. Since the units of K are cm² ∙ s^-¹, the units of J must be moles ∙ cm^-² ∙ s^-¹.

Question 8

In the diffusion equation, when X increases,

Accepted Answer

The answer of In the diffusion equation, when X increases,
...

Question 9

In the diffusion equation,

Accepted Answer

In the diffusion equation, permeability is typically represented by the symbol K, which is a measure of how easily a substance can diffuse through a medium.

Question 10

The Krogh diffusion coefficient (K) for O₂ in air is _______ K for O₂ in water.

Accepted Answer

The Krogh diffusion coefficient for O2 in air is about 200,000 times greater than in water because gases diffuse much more rapidly in air than in water due to lower density and viscosity.

Question 11

Refer to the figure shown.
 The eggs of which animal would most likely have the data profile in the figure?

Accepted Answer

The answer of Refer to the figure shown.
 The eggs...

Question 12

Refer to the figure shown.
 According to the figure, what was the most likely cause of the zeroing of oxygen partial pressure in the nest?

Accepted Answer

The answer of Refer to the figure shown.
 According to...

Question 13

Which of the following contributes to a respiratory gas partial pressure in solution? I. O₂ II. CO₂ III. O₂ bound to hemoglobin IV. HCO₃^- dissolved in plasma

Accepted Answer

O₂ and CO₂ in their free, dissolved forms contribute to the partial pressure of gases in solution. O₂ bound to hemoglobin and HCO₃^- do not contribute to the partial pressure.

Question 14

If the diameter of the body of a larval fish exceeded _______, diffusion alone would not be able to meet the demands of its oxygen consumption.

Accepted Answer

Diffusion is effective over small distances, typically less than 1 mm. Beyond this size, the surface area to volume ratio decreases, making diffusion insufficient for oxygen supply.

Question 15

A scuba diver remaining at a depth of 50 m for a significant amount of time needs to worry about the possible effects of which gas when he or she ascends?

Accepted Answer

When a scuba diver ascends, the pressure decreases, causing nitrogen that was dissolved in the blood at higher pressures to come out of solution, potentially forming bubbles. This can lead to decompression sickness, also known as "the bends."

Question 16

The "bends" refers to a physiological condition sustained by a scuba diver in which

Accepted Answer

The "bends," or decompression sickness, occurs when nitrogen gas comes out of solution in the blood due to a rapid ascent, forming bubbles that can cause joint pain and other symptoms.

Question 17

The process that occurs when a gas mixture or an aqueous solution flows and gas molecules in the gas or liquid phase are carried from place to place by the fluid flow is called

Accepted Answer

Convection is the process where gas molecules or particles in a fluid are transported from one place to another by the movement of the fluid itself.

Question 18

The principal process(es) by which animals use convection to transport gases is(are)

Accepted Answer

Ventilation and the pumping of blood are both processes that involve convection to transport gases in animals. Ventilation moves air in and out of the lungs, while the pumping of blood circulates oxygen and carbon dioxide throughout the body.

Question 19

The rate of convective gas transport depends on the

Accepted Answer

The rate of convective gas transport is determined by both the rate of fluid flow and the total concentration of gas in the fluid, as these factors dictate how much gas is transported through the system.

Question 20

The movement of water across a fish gill is a good example of

Accepted Answer

Fish gills utilize unidirectional flow, where water moves in one direction over the gill surfaces, allowing for efficient gas exchange.

Quiz 22: Introduction to Oxygen and Carbon Dioxide in Physiology

Which statement about gases dissolved in aqueous solutions is true?

If a water beetle has used up half of the oxygen in its air bubble, the concentration of oxygen in the bubble is ___ the concentration of oxygen in the water. The partial pressure of oxygen in the bubble is _ the partial pressure of oxygen in the water. Therefore, oxygen will move from the _____.

If a water beetle has been using an air bubble as a gill for 1 hour, the O₂ partial pressure will be _ that of air and the N₂ partial pressure will be _ that of air.

In which situation would a water beetle's gas bubble last the shortest amount of time as a functional gill?

Which statement regarding the diffusion of gases is false?

In the diffusion equation, if the units of K are cm² ∙ s^-¹, which of the following best represents the units for J?

In the diffusion equation, when X increases,

In the diffusion equation,

The Krogh diffusion coefficient (K) for O₂ in air is _______ K for O₂ in water.

Refer to the figure shown. The eggs of which animal would most likely have the data profile in the figure?

Refer to the figure shown. According to the figure, what was the most likely cause of the zeroing of oxygen partial pressure in the nest?

Which of the following contributes to a respiratory gas partial pressure in solution? I. O₂ II. CO₂ III. O₂ bound to hemoglobin IV. HCO₃^- dissolved in plasma

If the diameter of the body of a larval fish exceeded _______, diffusion alone would not be able to meet the demands of its oxygen consumption.

A scuba diver remaining at a depth of 50 m for a significant amount of time needs to worry about the possible effects of which gas when he or she ascends?

The "bends" refers to a physiological condition sustained by a scuba diver in which

The process that occurs when a gas mixture or an aqueous solution flows and gas molecules in the gas or liquid phase are carried from place to place by the fluid flow is called

The principal process(es) by which animals use convection to transport gases is(are)

The rate of convective gas transport depends on the

The movement of water across a fish gill is a good example of

Quiz 22: Introduction to Oxygen and Carbon Dioxide in Physiology

Which statement about gases dissolved in aqueous solutions is true?

If a water beetle has been using an air bubble as a gill for 1 hour, the O2 partial pressure will be _______ that of air and the N2 partial pressure will be _______ that of air.

In which situation would a water beetle's gas bubble last the shortest amount of time as a functional gill?

Which statement regarding the diffusion of gases is false?

In the diffusion equation, if the units of K are cm2 ∙ s-1, which of the following best represents the units for J?

In the diffusion equation, when X increases,

In the diffusion equation,

The Krogh diffusion coefficient (K) for O2 in air is _______ K for O2 in water.

Refer to the figure shown. The eggs of which animal would most likely have the data profile in the figure?

Refer to the figure shown. According to the figure, what was the most likely cause of the zeroing of oxygen partial pressure in the nest?

Which of the following contributes to a respiratory gas partial pressure in solution? I. O2 II. CO2 III. O2 bound to hemoglobin IV. HCO3- dissolved in plasma

If the diameter of the body of a larval fish exceeded _______, diffusion alone would not be able to meet the demands of its oxygen consumption.

A scuba diver remaining at a depth of 50 m for a significant amount of time needs to worry about the possible effects of which gas when he or she ascends?

The "bends" refers to a physiological condition sustained by a scuba diver in which

The process that occurs when a gas mixture or an aqueous solution flows and gas molecules in the gas or liquid phase are carried from place to place by the fluid flow is called

The principal process(es) by which animals use convection to transport gases is(are)

The rate of convective gas transport depends on the

The movement of water across a fish gill is a good example of

If a water beetle has been using an air bubble as a gill for 1 hour, the O₂ partial pressure will be _ that of air and the N₂ partial pressure will be _ that of air.

In the diffusion equation, if the units of K are cm² ∙ s^-¹, which of the following best represents the units for J?

The Krogh diffusion coefficient (K) for O₂ in air is _______ K for O₂ in water.

Which of the following contributes to a respiratory gas partial pressure in solution? I. O₂ II. CO₂ III. O₂ bound to hemoglobin IV. HCO₃^- dissolved in plasma