posted by Brooke J. .
Proteins found on the outside of cells and viruses are called ____________ , these are used by the body to _______________ pathogens.
Identify the response below that summarizes the correct sequence of events occurring as we breathe in.
Air pressure drops; rib cage moves in and down; diaphragm becomes dome-shaped; air rushes in.
Rib cage moves up and out; diaphragm flattens; chest cavity space increases; air pressure in the lungs drops.
Rib cage moves up and out; air rushes in; air pressure drops; diaphragm flattens.
Rib cage moves down and in; air pressure drops; diaphragm flattens; air rushes in.
Please help I do not know these!