Which organ's smooth muscles need to contract in order to reduce air movement to the mammalian respiratory surfaces?

a. those of the epiglottis
b. those of the large bronchi
c. those of the bronchioles
d. those of the trachea


Ans: c. those of the bronchioles

Biology & Microbiology

You might also like to view...

The functional unit of genetic information is the

A) nucleotide. B) gene. C) chromosome. D) protein.

Biology & Microbiology

What concept is used to express the growth rate of a

given population? a. doubling time b. population density c. population size d. carrying capacity e. biotic potential

Biology & Microbiology

The helical coil shape of an ?-helix fibrous protein provides what type of property to that protein?

a. rigidity b. strength c. elasticity d. heat tolerance

e. water retention

Biology & Microbiology

Steroid-based hormones are able to move across cell membranes easily because they are water soluble

Indicate whether the statement is true or false

Biology & Microbiology