Question

the intercalated disks of the myocardial muscle cells:

A)all the answers are correct

B)facilitate permeation of myocardial action potentials and transmit physical forces between cells

C)increase the number of t-tubules to transmit action potentials between the cardiomyoctes

D)augment the number synapses that activate the myocardial cells

The aortic and pulmonary valves have a smaller cross-sectional area than mitral or tricuspid valves. This results in:

A)higher velocity of flow through the aortic and pulmonary valves compared to that of the mortal and tricuspid valves with increased magnitude of the flow.

B)lower velocity of the flow through the aortic and pulmonary valves compared to that of the mortal and tricuspid valves with the same magnitude of flow.

C)Higher velocity of the flow through the aortic and pulmonary valves compared to that of the mortal and tricuspid valves with a resulting drop in magnitude of flow

D)Higher velocity of flow  through the aortic and pulmonary valves compared to that of the mortal and tricuspid valves with the same magnitude flow

Answer 1

The intercalated discs of the myocardial muscle cells

A. All the answers are correct

The aortic and pulmonary valves have a smaller cross- sectional area than mitral or tricuspid valves. This results in

C. Higher velocity of the flow through the aortic and pulmonary valves compared to that of the mitral and tricuspid valves with a resulting drop in magnitude of flow

Flow values for the ascending aorta, pulmonary artery and tricuspid valve inflow area were flow area shows similar in absolute magnitude (r= 0.93-0.98) The absolute magnitude of mitral valves shows highly variable in magnitude and showed the poorest correlation with flows from other areas( r=0.59-0.67)