Respiratory System

1

How many lobes does the right lung have?

Three

Two

One

Four

Five

Explanation

The right lung contains three lobes: upper, middle, and lower. The left lungs contains two lobes: upper and lower. The left lung is designed to be smaller than the right in order to accommodate the heart, which is situated slightly to the left.

2

How many lobes does the right lung have?

Three

Two

One

Four

Five

Explanation

The right lung contains three lobes: upper, middle, and lower. The left lungs contains two lobes: upper and lower. The left lung is designed to be smaller than the right in order to accommodate the heart, which is situated slightly to the left.

3

How many lobes does the right lung have?

Three

Two

One

Four

Five

Explanation

The right lung contains three lobes: upper, middle, and lower. The left lungs contains two lobes: upper and lower. The left lung is designed to be smaller than the right in order to accommodate the heart, which is situated slightly to the left.

4

Mountain climbing at a high altitude can have an affect on one's ability to breath efficiently. At high altitudes, atmospheric pressure can decrease dramatically and result in a lower drive for oxygen into the lungs. The body will try to compensate by increasing the rate of respiration.

How does hyperventilating change the blood chemistry in the human body?

Hyperventilating will release more $CO_{2}$ and result in an increase in the blood's pH

Hyperventilating will release more $CO_{2}$ and result in a drop in the blood's pH

Hyperventilating will retain more $CO_{2}$ and result in an increase in the blood's pH

Hyperventilating will retain more $CO_{2}$ and result in a decrease in the blood's pH

Hyperventilating will not affect the blood's pH.

Explanation

$CO_{2} + H_{2} 0 \leftrightarrow HCO_{3}^{-} + H^{+}$

Hyperventilation will result in the expiration of more $CO_{2}$ . It can be deduced that a greater amount of expired $CO_{2}$ will cause the above equation to shift to the left. The shifting of the equation to the left will further promote the conversion of $H^{+}$ and $HCO_{3}^{-}$ to $CO_{2}$ and $H_{2}0$ . Since the body uses $HCO_{3}^{-}$ as a buffer, there will be a greater quantity of the bicarbonate in the body than $H^{+}$ . When the equation shifts to the left, the $H^{+}$ will deplete at a faster rate and result in a higher $HCO_{3}^{-}$ to $H^{+}$ ratio. A higher $HCO_{3}^{-}$ to $H^{+}$ ratio will cause the body's blood to become more basic (increase in pH); therefore, hyperventilation increases blood bascicity.

5

Mountain climbing at a high altitude can have an affect on one's ability to breath efficiently. At high altitudes, atmospheric pressure can decrease dramatically and result in a lower drive for oxygen into the lungs. The body will try to compensate by increasing the rate of respiration.

How does hyperventilating change the blood chemistry in the human body?

Hyperventilating will release more $CO_{2}$ and result in an increase in the blood's pH

Hyperventilating will release more $CO_{2}$ and result in a drop in the blood's pH

Hyperventilating will retain more $CO_{2}$ and result in an increase in the blood's pH

Hyperventilating will retain more $CO_{2}$ and result in a decrease in the blood's pH

Hyperventilating will not affect the blood's pH.

Explanation

$CO_{2} + H_{2} 0 \leftrightarrow HCO_{3}^{-} + H^{+}$

Hyperventilation will result in the expiration of more $CO_{2}$ . It can be deduced that a greater amount of expired $CO_{2}$ will cause the above equation to shift to the left. The shifting of the equation to the left will further promote the conversion of $H^{+}$ and $HCO_{3}^{-}$ to $CO_{2}$ and $H_{2}0$ . Since the body uses $HCO_{3}^{-}$ as a buffer, there will be a greater quantity of the bicarbonate in the body than $H^{+}$ . When the equation shifts to the left, the $H^{+}$ will deplete at a faster rate and result in a higher $HCO_{3}^{-}$ to $H^{+}$ ratio. A higher $HCO_{3}^{-}$ to $H^{+}$ ratio will cause the body's blood to become more basic (increase in pH); therefore, hyperventilation increases blood bascicity.

6

Mountain climbing at a high altitude can have an affect on one's ability to breath efficiently. At high altitudes, atmospheric pressure can decrease dramatically and result in a lower drive for oxygen into the lungs. The body will try to compensate by increasing the rate of respiration.

How does hyperventilating change the blood chemistry in the human body?

Hyperventilating will release more $CO_{2}$ and result in an increase in the blood's pH

Hyperventilating will release more $CO_{2}$ and result in a drop in the blood's pH

Hyperventilating will retain more $CO_{2}$ and result in an increase in the blood's pH

Hyperventilating will retain more $CO_{2}$ and result in a decrease in the blood's pH

Hyperventilating will not affect the blood's pH.

Explanation

$CO_{2} + H_{2} 0 \leftrightarrow HCO_{3}^{-} + H^{+}$

Hyperventilation will result in the expiration of more $CO_{2}$ . It can be deduced that a greater amount of expired $CO_{2}$ will cause the above equation to shift to the left. The shifting of the equation to the left will further promote the conversion of $H^{+}$ and $HCO_{3}^{-}$ to $CO_{2}$ and $H_{2}0$ . Since the body uses $HCO_{3}^{-}$ as a buffer, there will be a greater quantity of the bicarbonate in the body than $H^{+}$ . When the equation shifts to the left, the $H^{+}$ will deplete at a faster rate and result in a higher $HCO_{3}^{-}$ to $H^{+}$ ratio. A higher $HCO_{3}^{-}$ to $H^{+}$ ratio will cause the body's blood to become more basic (increase in pH); therefore, hyperventilation increases blood bascicity.

7

To initiate inhalation, the diaphragm contracts, making the pressure inside the lungs .

lower than the pressure outside the body

higher than the pressure outside the body

the same as the pressure outside the body

zero

None of these

Explanation

Inhalation happens by making the pressure in the lungs lower relative to the pressure outside the body. When the diaphragm contracts, it increases the volume of the thoracic cavity. By Boyle's law, there is an inverse relationship between pressure and volume of a gas. Thus the pressure of the thoracic cavity decreases and since air will flow from high to low pressure, this pulls air into the lungs during inhalation.

8

To initiate inhalation, the diaphragm contracts, making the pressure inside the lungs .

lower than the pressure outside the body

higher than the pressure outside the body

the same as the pressure outside the body

zero

None of these

Explanation

Inhalation happens by making the pressure in the lungs lower relative to the pressure outside the body. When the diaphragm contracts, it increases the volume of the thoracic cavity. By Boyle's law, there is an inverse relationship between pressure and volume of a gas. Thus the pressure of the thoracic cavity decreases and since air will flow from high to low pressure, this pulls air into the lungs during inhalation.

9

To initiate inhalation, the diaphragm contracts, making the pressure inside the lungs .

lower than the pressure outside the body

higher than the pressure outside the body

the same as the pressure outside the body

zero

None of these

Explanation

Inhalation happens by making the pressure in the lungs lower relative to the pressure outside the body. When the diaphragm contracts, it increases the volume of the thoracic cavity. By Boyle's law, there is an inverse relationship between pressure and volume of a gas. Thus the pressure of the thoracic cavity decreases and since air will flow from high to low pressure, this pulls air into the lungs during inhalation.

10

Terrestrial animals must combat the drying out of respiratory surfaces due to evaporation. What is one strategy they use?

Folding the respiratory surface into the body

Increased perspiration of cells on respiratory surface

Excretion of fluids from walls of lungs

Having very low respiratory rates

Increased metabolism

Explanation

By folding the respiratory surface into the body, terrestrial animals increase the humidity of the environment of the respiratory surface, which will minimize evaporation and maintain moisture. Note that water loss via evaporation and perspiration accounts for the majority of water loss in terrestrial mammals.

Help Questions

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation