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..
The male is called a  Bull and the femâ¦ale a Cow. It's almost like learning another  language where instead of being called a male he's called a Bull  and instead of her being called a female she's called a Cow. Steer  is a term you will hear as well. A Steer is a bull that has been  neutered or castrated.