Upon contraction, the smallest motor unit, that is, the one associated with the fewest muscle fibers, is the normally the first activated. As the contraction progresses, larger motor units are brought into play.Efficient muscle contraction depends on the motor units within a muscle working effectively together.pon contraction, the smallest motor unit, that is, the one associated with the fewest muscle fibers, is the normally the first activated. As the contraction progresses, larger motor units are brought into play.
Trojan programs are most dangerous because they can create a back door. into your computer that gives malicious hackers direct access to your. system. Once installed, Trojans can hijack your PC and upload usernames, passwords, credit card numbers, social security numbers, and bank account.
Updated March 23, 2017. Malware, a shortened combination of the words malicious and software, is a catch-all term for any sort of software designed with malicious intent. That malicious intent is often theft of your private information or the creation of a backdoor to your computer so someone can gain access to it without your permission.