Air in respiratory passages that does not contribute to gas exchange

Area between the teeth and lips/cheeks

Wormlike sac that out pockets from the cecum

Which respiratory-associated muscles would contract if you were to blow up a balloon?

Do the following factors generally increase or decrease the respiratory rate and depth?  Increase in blood CO2

The most powerful respiratory stimulus for breathing in a healthy person is ________.

The parasympathetic nervous system influences digestion by–

The primary immune response ________.

Which of the following maintains the patency (openness. of the trachea?

A protein molecule will be digested by enzymes secreted by–