The primary muscles of respiration include the: a. Diaphragm ...

[09madisonrousseau09]

The primary muscles of respiration include the:
 
  a. Diaphragm and intercostals.
  b. Sternomastoids and scaleni.
  c. Trapezii and rectus abdominis.
  d. External obliques and pectoralis major.

Question 2

Which statement about the apices of the lungs is true? The apices of the lungs:
 
  a. Are at the level of the second rib anteriorly.
  b. Extend 3 to 4 cm above the inner third of the clavicles.
  c. Are located at the sixth rib anteriorly and the eighth rib laterally.
  d. Rest on the diaphragm at the fifth intercostal space in the midclavicular line (MCL).

[nanny]

Answer to Question 1

ANS: A
The major muscle of respiration is the diaphragm. The intercostal muscles lift the sternum and elevate the ribs during inspiration, increasing the anteroposterior diameter. Expiration is primarily passive. Forced inspiration involves the use of other muscles, such as the accessory neck musclessternomastoi d, scaleni, and trapezii muscles. Forced expiration involves the abdominal muscles.

Answer to Question 2

ANS: B
The apex of the lung on the anterior chest is 3 to 4 cm above the inner third of the clavicles. On the posterior chest, the apices are at the level of C7.

[09madisonrousseau09]

Thank you

[nanny]

No problemo