The emergency department is awaiting the arrival of a spinal ...

[rosent76]

The emergency department is awaiting the arrival of a spinal cord-injured patient. Knowing the innervation of the diaphragm, a patient with which type of injury may be in need of immediate mechanical ventilation? Injury to the
 
  A)
  C4 area.
  B)
  C7 area.
  C)
  T1 area.
  D)
  T4 area.

Question 2

Which of the following statements best captures the etiology of the acute response phase of extrinsic (atopic) asthma?
 
  A)
  IgG production is heightened as a consequence of exposure to an allergen.
  B)
  Airway remodeling results in airflow limitations.
  C)
  Epithelial injury and edema occur along with changes in mucociliary function.
  D)
  Chemical mediators are released from presensitized mast cells.

[flannelavenger]

Answer to Question 1

Ans:
A

Feedback:

The diaphragm is the principal muscle of inspiration. It is innervated by the phrenic nerve roots, which arise from the cervical level of the spinal cord, mainly from C4 but also C3 and C5.

Answer to Question 2

Ans:
D

Feedback:

The acute response phase of extrinsic asthma is characterized by the release of chemical mediators from mast cells that have been sensitized. Epithelial injury and edema, as well as airway remodeling, are not associated with the acute phase, and IgE, not IgG, is primarily involved in asthma.