John is jogging on a winter day. The outdoors temperature is 31 degrees F. Yet, his body temperature is 98 degrees F. What term best describes the process causing this difference in temperature?

A.
homeostasis
B.
pathophysiology
C.
fever
D.
hyperthyroidism

A. Homeostasis

What is the second link in the chain of transmission?

A.
infectious agent
B.
portal of entry
C.
portal of exit
D.
reservoirs