Choose the incorrect statement about the huma | vedclass

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Question

(C) The human heart is composed of cardiac muscle,but it also contains connective tissue (valves,chordae tendineae,fibrous skeleton) and specialized n

Vedclass · Accepted Answer

The nodal tissue in the lower left corner of the right atrium can generate $70-75 	ext{ min}^{-1}$ action potentials.

Vedclass · Answer

(C) The human heart is composed of cardiac muscle,but it also contains connective tissue (valves,chordae tendineae,fibrous skeleton) and specialized nodal tissue. Thus,statement $A$ is incorrect as the heart is not made entirely of cardiac muscle.Statement $B$ refers to the Sino-Atrial Node $(SAN)$,which is located in the right upper corner of the right atrium and acts as the pacemaker.Statement $C$ is incorrect because the Atrio-Ventricular Node $(AVN)$ is located in the lower left corner of the right atrium,but it generates action potentials at a rate of $40-60 	ext{ min}^{-1}$,not $70-75 	ext{ min}^{-1}$.Statement $D$ is correct as nodal tissue is auto-excitable.

Choose the incorrect statement about the human heart $:-$

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