1. Forced expiratory movements are produced by contraction of the
a) scalenes
b) diaphragm
c) external intercostals
d) serratus anterior
2. which of the following would be found in wall of a tertiary bronchus?
a) C rings of cartilage
b) cartilage plates only
c) a mix cartilage plates and smooth muscles
d) smooth muscle only
e) none of the above