Otterbein/CRNA A&p Midterm Review - Respiratory
47 Questions
| Attempts: 163
.
Questions and Answers
- 1.The diaphragm is innervated by the phrenic nerve originating from which 3 cervical nerves?
- 2.Boat-rocking, or paradoxical movement, occurs when:
- A.
Patient is medically paralyzed.
- B.
When the airway is obstructed.
- C.
When you tell your friend that those jeans do make her look fat.
- 3.Interscalene blocks always affect the _____ nerve, causing a hemidiaphragm.
- 4.During inspiration, the intrapleural space becomes more negative, making intrapulmonary pressure more negative - this can be up to -90 cmH2O.
- A.
True
- B.
False
- 5.Normal ______ is passive recoil without contraction, the lungs and chest wall are elastic which cause the intrapulmonary pressure to return to near zero at end expiration.
- 6.Which two laws of physics contribute to resistance in the lungs?LL
- A.
Law of Laplace
- B.
Poisuelle's law
- C.
Bernoulli's
- 7.Lung compliance is increased with emphysema.
- A.
True
- B.
False
- 8.Normal lung compliance is ___ mL/cmH2O
- 9.Which of the following is not true about the dorsal respiratory group?
- A.
Responsible for the basic rhythm of ventilation.
- B.
Sends impulses via the phrenic and external intercostal nerves to the diaphragm and external intercostal muscles.
- C.
Controls expiration with forceful breathing
- D.
Intrinsic periodic firing
- 10.The _____ respiratory group deals mostly with expiration.
- 11.Central chemoreceptors are located in the _____ surface of the medulla.
- 12.Central chemoreceptors respond to changes in pO2.
- A.
True
- B.
False
- 13.Changes in pCO2 are the most important stimulus to ventilation because CO2 is soluble and readily crosses the blood brain barrier, where H+ and HCO3- are polar and do not cross.
- A.
True
- B.
False
- 14.Carotid bodies and aortic bodies are the location of _______ chemoreceptors.
- 15.Peripheral chemoreceptors respond to decreases in ARTERIAL pO2 and pH and somewhat to increases in pCO2.
- A.
True
- B.
False
- 16.The rate of diffusion is directly proportional to:
- A.
Surface area
- B.
Partial pressure difference of gas
- C.
Solubility of gas
- D.
Thickness of the membrane
- E.
Square root of the molecular weight
- 17._% of cardiac output goes to lung parynchema, not participating in gas exchange.
- 18.What is the partial pressure of inspired O2 in room air at sea level? Round to the nearest whole number.
- 19.PiO2 - (PACO2/RQ) is the equation for ______ PO2. This is determined by the balance of O2 removal and replenishment.
- 20.Your patient's A-a gradient and CO2 gradient is greater than normal, this implies a ____ mismatch.
- 21.What is the equation for total O2 delivered?
- 22.The body requires 120-200 mL/min of O2.
- A.
True
- B.
False
- 23.Henry's law applies to _________ oxygen. It states that each 1 mmHg of PO2 dissolves into 0.003 mL O2/100 mL of blood.
- 24.1 gram of Hgb contains ____ mL of O2.
- 25.All of the following cause O2 dissociation curve to shift to the right (O2 affinity for hgb is reduced) EXCEPT:
- A.
Increase in H ion concentration
- B.
Increase in temperature
- C.
Increase in CO levels
- D.
Sickle cell anemia
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