The body system
which is responsible for the exchange of gases b/w body fluid and outer
environment is called…..
a) excretory system
b) circulatory system
c) respiratory system
d) nervous system
The upper respiratory tract includes all except…..
a) larynx
b) nostrils
c) nasal cavity
d) pharynx
Blood capillaries under the mucous membrane warm the air about……..°C.
a) 25
b) 30
c) 37
d) 40
The upper respiratory tract includes all except…..
a) larynx
b) trachea and bronchi
c) lungs
d) pharynx
Trachea consists of…….C-shaped cartilage.
a) 10-12
b) 12-15
c) 15-20
d) 20-22
Which of the following protein/s is/are present in the walls of alveoli?
a) elastin
b) collagen
c) myosin
d) both a and b
