The motor point is usually located at the center of the muscle mass where the motor nerve enters the muscle.
Definition A carcinogen is defined as something that can directly cause cancer. This can be a chemical substance, a virus, or even the medications and radiation we use to treat cancer. While many cancers are caused by a carcinogen or combination of carcinogens, the tendency to develop cancer may also be inherited as part of our genome.
A carcinogen is an agent that induces neoplasia, i.e. cancer. Whatâs an agent? Chemicals, radiation, and viruses are among the agents implicated in causing cancer. A mutagen is a chemical that can cause changes (mutations) to the genetic material of a cell (DNA). A mutagen is one possible pathway to carcinogenesis. When mutations occur in germ cells (i.e. sperm or ova) it is possible for the mutation to be transmitted to offspring. A mutagen may be a carcinogen, but the link is not absolute. That is, not all chemicals shown to be mutagens are necessarily carcinogens. Conversely, not all carcinogens are mutagens. There are nongenotoxic carcinogensâchemicals that cause cancer by several mechanisms including by inducing sustained cell injury. Another important idea.