A 73- years old woman complains of shortness of breath and intermittent fainting spells. Her doctor runs various tests and finds that the atrioventricular (AV) node is not functioning properly. What is the suggested treatment? Explain 

A 50-years old man fainted on the street and was taken the hospital with low heartbeat of about 25beat/min. His EKG showed elongated periods especially of PR. The doctors ended up conducting a temporary cardiac pacing. What is most likely happening

At the ventricular systole, _________

The parasympathetic system activity decreases during anxiety conditions or frightness. Do you think that the cardiac output and heart rate would increase in these cases?

A doctor would hear the apical impulse the best in the area _________

pacemaker cells that spontaneously depolarizer and initiate depolarization to the rest of the heart are non-contractile cells

explain the relationship between plasma proteins and the occurrence of leg edema in hepatitis cases 

Thyroxine increases heart rate; enhances effects of norepinephrine and epinephrine

The cardiac skeleton is made up of crisscrossing interlacing layer of connective tissue and it _______ (Choose all that apply)

What organ(s) in the body is(are) the main regulator of erythrocyte production? (Choose all that apply)