Friday
April 18, 2014

Homework Help: Science

Posted by Brooke J. on Friday, February 22, 2013 at 7:43pm.

Proteins found on the outside of cells and viruses are called ____________ , these are used by the body to _______________ pathogens.

antigens; help
antibodies; make
antigens; identify
antibodies; reproduce

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!

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