MCQ
The nerve like modified muscle in the right auricle is known as
- ALymph node
- BAtrio-ventricular node
- ✓Pacemaker
- DBulbus arteriosus
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$(I)$ Hormones increase alterthess
$(II)$ Hormones increase the heart beat
$(III)$ Stimulate the breakdown of glycogen
$(IV)$ Stimulate the breakdown of lipids and proteins