Week 6 - The Respiratory System Flashcards
Cutting the phoenix nerves will result in
A: Air entering the pleural cavity
B: Paralysis of the diaphragm
C: Stimulation of the diaphragmatic reflex
D: Paralysis of the epiglottis
B: Paralysis of the diaphragm
Which of the following laryngeal cartilage is / are not paired?
A: Epiglottis B: Arytenoid C: Cricoid D: Cuneiform E: Corniculate
A: Epiglottis and C: Cricoid
Under ordinary circumstances, the inflation reflex is initiated by
A: noxious chemicals
b: The central respiratory group
c: over inflation of the alveoli and bronchioles
d: the confine respiratory centers
c: over inflation of the alveoli and bronchioles
The detergent-like substance that keeps the alveoli from collapsing between breaths because it reduces the surface tension of the water film in the alveoli is called
A: Lecithin
B: Bile
c: surfactant
d: reluctant
c: Surfactant
Which of the following determines the direction of gas movement?
A: solubility in water
B: Partial pressure gradient
C: Temperature
d: Molecular weight and size of the gas molecule
b: Partial pressure gradient
When the inspiratory muscles contract
A: the size of the thoracic cavity increases in diameter
B: The size of the thoracic increases in length
c: The volume of the thoracic cavity decreases
d: The size of the thoracic cavity increases in both length and diameter
d: The size of the thoracic cavity increases in both length and diameter
The nutrient blood supply of the lungs is provided by
A: the pulmonary arteries
b: the aorta
c: the pulmonary veins
d: the bronchial arteries
d: the bronchial arteries
Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by
A: active transport
b: diffusion
c: filtration
d: osmosis
b: Carbon monoxide poisoning
Which of the following would not normally Br treated by 100% oxygen therapy? (choose all that apply)
A: anoxia
b: Carbon monoxide poisoning
c: respiratory crisis in an emphysema patient
d: eupnea
c: respiratory crisis in an emphysema patient
d: eupnea
Most oxygen in the blood is
A: in solution in the plasma
b: combined with plasma proteins
c: chemically combined with the heme in red blood cells
d: in solution in the red blood cells
c: chemically combined with the heme in red blood cells
Which of the following has the greatest stimulating effect on the respiratory centres in the brain?
A: oxygen
b: Carbon dioxide
c: Calcium
d: Willpower
b: Carbon dioxide
In mouth-to-mouth artificial respiration, the rescuer blows air from his or her own respiratory system into that of the victim.
Which of the following statements are correct?
1: Expansion of the victim’s lungs is brought about by blowing air in higher than atmospheric pressure (positive-pressure breathing)
2: During inflation of the lungs, the intrapleural pressure increases
3: This technique will not work if the victim has a hole in the chest wall, even if the lungs are intact
4: Expiration during this procedure depends on the elasticity of the alveolar and thoracic walls
A: All of these. b: 1,2,4 C: 1,2,3. D: 1,4
b: 1,2,4
A baby holding its breath will
A: have brain cells damaged because of low blood oxygen levels
b: automatically start to breath again when the carbon dioxide levels in the blood reach a high enough value
c: suffer heart damage because of increased pressure in the carotid sinus and aortic arch areas
d: be called a “blue baby”
b: automatically start to breath again when the carbon dioxide levels in the blood reach a high enough value
Under Ordinary circumstances, which of the following blood components is of no physiological significance?
A: Bicarbonate ions
b: carbaminohemoglobin
c: nitrogen
d: chloride
c: nitrogen
Damage to which of the following would most likely result in cessation of breathing?
A: the pontine respiratory group
b: the ventral respiratory group of the medulla
c: the stretch receptors in the lungs
d: the dorsal respiratory group of the medulla
b: the ventral respiratory group of the medulla
