In the lower respiratory tract, cartilage plates first appear at the
A) primary bronchi.
B) secondary bronchi.
C) tertiary bronchi.
D) bronchioles.
E) terminal bronchioles.
Answer: B
You might also like to view...
Which prenatal structure forms the ascending aorta and pulmonary trunk?
A. Truncus arteriosus B. Sinus venosus C. Primitive atrium D. Primitive ventricle E. Conus cordis
In the visual pathway,
a. fibers from the medial side of a retina pass to the opposite side of the brain b. fibers from the lateral side of a retina pass to the opposite side of the brain c. fibers from the medial side of the retina pass to the same side of the brain d. both a and b are true e. both b and c are true
The lateral fibula serves as the attachment for knee joint structures but ____ articulate with the femur or patella.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT true of the crossed extensor reflex?
A. When flexor muscles of the lower limb contract due to stepping on a sharp object, the extensor muscles in the same limb are inhibited. B. It occurs in conjunction with a withdrawal reflex. C. It occurs in reflexes in both the upper and lower limb. D. When flexor muscles of the lower limb contract due to stepping on a sharp object, the extensor muscles in the opposite limb are stimulated. E. The crossed extensor reflex helps a person remain upright during the withdrawal reflex.