When exercising in cold weather, the effects of moisture can usually be overcome by

In which of the following ways does the integumentary system prevent pathogens from entering the body?

A) Via humoral immunity B) Via cell-mediated immunity C) By secreting chemotactic factors D) By providing a barrier to the environment

____ cylinders are constructed with an aluminum inner shell and fully wrapped with Kevlar or carbon fibers for strength.

A. Fiberglass B. Metal C. Synthetic D. Composite