Quiz 25: Control of Respiration
Biology
Q 1Q 1
The respiratory control center is located in:
A)The cerebral cortex.
B)The pons.
C)The medulla oblongata.
D)The cerebellum.
Free
Multiple Choice
B
Q 2Q 2
Carotid sinus nerve activity is increased in the presence of:
A)High O2 levels in the blood.
B)Normal CO2 levels in the blood.
C)Low O2 content.
D)Low pH.
Free
Multiple Choice
D
Q 3Q 3
Increased activity in the neurons in the dorsal respiratory group is associated with:
A)High lung volume.
B)High levels of CO2 in the blood.
C)High levels of O2 in the blood.
D)Breath holding.
Free
Multiple Choice
B
Q 4Q 4
Changes in partial pressure of oxygen (Po2)are recognized/sensed by:
A)Central chemoreceptors.
B)Peripheral chemoreceptors.
C)Pulmonary mechanoreceptors.
D)The blood-brain barrier.
Free
Multiple Choice
Q 5Q 5
The Hering-Breuer reflex is:
A)An inspiratory inhibitory reflex.
B)Stimulated by lung deflation.
C)Mediated by the phrenic nerve.
D)Activated by low Po2.
Free
Multiple Choice
Q 6Q 6
Mild-moderate exercise is associated with:
A)Increases in arterial partial pressure of carbon dioxide (Pco2).
B)Decreases in arterial Po2.
C)Normal pH.
D)Lactic acidosis.
E)Anaerobic metabolism.
Free
Multiple Choice
Q 7Q 7
Irritant receptors in the lower airway respond to all of the following except:
A)Chemical vapors.
B)Physical factors.
C)Distortion of the alveolar walls.
D)Particles.
Free
Multiple Choice
Q 8Q 8
Central apnea is characterized by:
A)Vigorous chest wall and abdominal muscle activity.
B)Cessation of airflow at the nose.
C)Snoring.
D)Severe hypercarbia.
Free
Multiple Choice
Q 9Q 9
The ventilatory response to CO2 is enhanced by:
A)Hypoxia.
B)Alkalosis.
C)Sleep.
D)Barbiturates.
Free
Multiple Choice
Q 10Q 10
The respiratory "pacemaker" is located in:
A)The dorsal respiratory group.
B)The ventral respiratory group.
C)The cerebral cortex.
D)Chest wall joints and muscles.
Free
Multiple Choice