Answer:
Automaticity speaking only about heart cells refers when cardiac pacing has the ability or property of depolarizing the myocardial cells creating heart beats spontaneously.
Explanation:
The spontaneous activity is initiated by specific cardiac cells that generate periodical electrical cycles. In the normal heart, automaticity is confined to the sinus node (remember that this is the natural pacemaker of the heart) and other conducting tissues. Cells that can reach the limit in the shortest amount of time have the greatest automaticity capacity since they can produce action potentials at a quicker rate than other cells.
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Their body is more susceptible to illness<span />
Answer: it was too small to be seen by optical microscope unlike many bacteria
Explanation:
The disease formerly referred to as Russian flu' before it was later known as the 'Spanish flu' was considered as acts of god in 1918.
It was first thought that the causative agent was Pfeiffers bacillus. Alas, they were wrong. It was caused by VIRUS.
The disease caused the destabilization of social and political orders for decades.
They later cultured the virus from diseased tobacco leaves.
