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BIOL 215 Sample Exam 3

Terms in this set (122)

Pulmonary edema and pulmonary fibrosis cause hypoxemia by:
A) Creating alveolar dead space
b) Decreasing O2 in inspired gas
C) Creating a right-to-left shunt
D) Impairing alveocapillary membrane diffusion
Impairing alveocapillary membrane diffusion
Alveolar dead space is the result of:
A) Pulmonary edema
B) Pulmonary emboli
C) Atelectasis
D) Pneumonia
Pulmonary emboli
Pressure in the pleural space is:
A) Atmospheric
B) Below atmospheric
C) Above atmospheric
D) variable
Below atmospheric
Smokers are prone to developing emphysema (a condition that can reduce the functional surface areas of the lungs) leading to a situation of hypoventilation (reduced respiration), which can cause hypercapnia (higher than normal levels of CO2 in blood). Based on this information, which of the following statements is CORRECT?

A) Chemoreceptors in medulla oblongata detect the change in CO2 levels and respond by increasing sympathetic stimulation of the heart in order to resist the decreasing blood pH caused by hypercapnia

B) Baroreceptors in medulla oblongata detect the change in CO2 levels and respond by increasing sympathetic stimulation of the heart in order to resist the decreasing blood pH caused by hypercapnia

C) Chemoreceptors in medulla oblongata detect the change in CO2 levels and respond by increasing parasympathetic stimulation of the heart in order to resist the increasing blood pH caused by hypercapnia

D) Baroreceptors in medulla oblongata detect the change in CO2 levels and respond by increasing parasympathetic stimulation of the heart in order to resist the increasing blood pH caused by hypercapnia
Chemoreceptors in medulla oblongata detect the change in CO2 levels and respond by increasing sympathetic stimulation of the heart in order to resist the decreasing blood pH caused by hypercapnia
Visceral pleura is found
A) Inside the terminal bronchioles.
B) On the surface of the lung
C) On the walls of the thorax, diaphragm, and mediastinum.
D) In the trachea and bronchi.
On the surface of the lung
Regarding gas exchange, internal respiration refers to the diffusion of gases (CO2 and O2) between
A) The lungs and the blood
B) The blood and the body tissues
C) The lungs and the body tissues
D) The heart and the lungs
The blood and body tissues
This structure helps close the nasopharynx when you swallow (preventing food from entering the nasal cavity)
A) Uvula
B) Epiglottis
C) Lingual tonsil
D) Upper esophageal sphincter
E). Labial frenulum
uvula
The general gas law (Boyle's law) states that:
A) Pressure of a gas is equal to its volume
B) Pressure of a gas is inversely proportional to its volume
C) Pressure of a gas increases when its volume increases
D) Pressure of a gas decreases when its volume decreases
Pressure of a gas is inversely proportional to its volume
Arrange the following items numbered 1, 2 and 3 in order from the highest to lowest partial pressure of oxygen: PO2 and select the letter that corresponds to the order you think is correct from choices A-E below [Hint: think about blood flow]
1. PO2 of pulmonary veins
2. PO2 of venous end of tissue capillary 3. PO2 of alveolar air (still in alveoli)
A) 1, 2, 3
B) 2, 1, 3
C) 2, 3, 1
D) 3, 1, 2
E) 3, 2, 1
3, 2, 1
Using the Table above, indicate which of the patients above has normal respiratory values. (Hint: think about the values you know)
A) Patient A
B) Patient B
C) Patient C
D) Patient D
Patient C
Amount of air that can be inspired forcefully above the normal tidal volume
A. Tidal volume
B. Inspiratory reserve volume
C. Vital capacity
D. Residual volume
E. Expiratory reserve volume
Inspiratory reserve volume
The volume of air inspired and expired during normal quiet breathing (at rest)
A. Tidal volume
B. Inspiratory reserve volume
C. Vital capacity
D. Residual volume
E. Expiratory reserve volume
Tidal volume
The volume of air remaining in the lungs after maximum expiration
A. Tidal volume
B. Inspiratory reserve volume
C. Vital capacity
D. Residual volume
E. Expiratory reserve volume
residual volume
The amount of air that can be forcefully expired beyond normal tidal volume
A. Tidal volume
B. Inspiratory reserve volume
C. Vital capacity
D. Residual volume
E. Expiratory reserve volume
expiratory reserve volume
If the hydrogen ion concentration in the blood increases, bicarbonate ions act as buffers by
A) Removing excess hydrogen ions from the plasma
B) Releasing hydrogen ions into the plasma
C) Dissociating into H+ and CO3 -
D) Combining with chloride ions
E) Combining with hemoglobin
Removing excess hydrogen ions from the plasma
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