Answer: d. a person’s body temperature must remain precisely at its set point.
Explanation:
Homeostasis is the ability of the body to maintain a stable, equilibrium and balance in the internal environment in accordance to the changes occurring in the external environment.
Homeostasis helps in maintainace of the internal body temperature in accordance with the external temperature of the body. It helps in increasing the survival chances of the organism.
The person body temperature does not remain precisely at a set point instead follows a wide range from 97°F to 99°F. A temperature over the 100.4°F indicates the condition of fever caused by the illness or infection also the body temperature may change normally throughout the day.
All of the above. I can testify from personal experience.
Answer: The heart consists of four chambers, two atria (upper chambers) and two ventricles (lower chambers). There is a valve through which blood passes before leaving each chamber of the heart. The valves prevent the backward flow of blood.
A. chest pain is the correct answer
