Why the left lung is smaller than right lung?
a) because of asymmetrical position of liver
b) because of asymmetrical position of heart
c) because of asymmetrical position of intestine
d) because of asymmetrical position of stomach
In thoracic cavity, the two lungs rest with their bases on the…….
a) diaphragm
b) vertebral column
c) pelvic girdle
d) intestine
Explanation: It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily.
In thoracic cavity the apexes of the two lungs extend above…….
a) floating ribs
b) false ribs
c) 3rd rib
d) 1st rib
Which of the following have special cells that produce detergent like chemical?
a) alveoli
b) larynx
c) bronchi
d) bronchioles
Explanation: this chemical is known as surfactant
What is/are the function of detergent like chemical produced by the cells of alveoli (surfactant)?
a) lower the surface tension
b) reduce the effort to breath
c) kills foreign germs
d) all of these
Which of the following membranous sac encloses each lung?
a) renal capsule
b) pericardium
c) pleura
d) meningies
