The answer is <span>atrial depolarization. good luck bro</span>
<span>An example of concentric contraction is doing a biceps curl. The curl exercise is targeting the biceps muscles on the front of the upper arm and only several muscles assist during the movement. Moreover, concentric muscle contraction is a type of muscle activation that increases the tension on a muscle as it shortens and this activation begins the process of muscle strengthening and hypertrophy. </span>
<span>This is a sign of the primary stage of syphilis. These lesions, or chancres, will show up in the exact spot that the bacteria originally entered the body. This is generally a sign of the infection. The illness often incubates for long periods of time, from between ten and ninety days, so it could be months from the original contact.</span>
