An exposure pathway-describes a unique mechanism by which an. individual or population is exposed to chemical or physical agents at or originating from. a site. Each exposure pathway includes a source or release from a source, an exposure. point, and an exposure route.
Terminology: Young cattle are called calves. A young male is called a bull calf; a young female before she has calved the second time is called a heifer (pronounced heffer). A young female that has had only one calf is sometimes called a first-calf heifer..
He could be called a bull calf before he is weaned or a yearling bull if he is about a year old (more or less). For a fair number of producers, especially those from the European Union and a fair few in North America, it is known as a <b>bullock</b>. However, a number of others also refer to such an animal as simply a <b>young bull</b>. He could be called a <b>bull calf</b> before he is weaned or a <b>yearling bull</b> if he is about a year old (more or less).