A58-year-old teacher presents to your clinic with a complaint of breathlessness with activity. the patient has no chronic conditions and does not take any medications, herbs, or supplements. which of the following symptoms is appropriate to ask about in the cardiovascular review of systems?
a) abdominal pain
b) orthopnea
c) hematochezia
d) tenesmus

Explanation:

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.