Which is a uniquely sympathetic function?
a. regulation of body temperature
b. regulation of pupil size
c. regulation of respiratory rate
d. regulation of cardiac rate

The correct answer will be option-A

Explanation:

Homeostasis refers to maintaining the internal temperature of the body irrespective of the external condition. However, the signals from the outer environment directly influence the mechanism which maintains the homeostatic state.

The homeostatic mechanisms maintain the body temperature and pH of the blood.

The sympathetic nervous system regulates the body temperature by producing hormones and activation of the parasympathetic nervous system. All other responses of the sympathetic nervous system are not unique.

Thus, option-A is the correct answer.

The triple point for water

Explanation:

The triple point for water can be explained as the temperature-pressure condition at which all the phases of water are in the state of equilibrium. This means that all three states of water namely solid, liquid and water coexists in thermodynamic equilibrium. This plays an important role in the identification of compounds. The value of the triple point of water is approximately 0.01°C.

In the polar and the sub-polar region, the temperature and pressure are normally lower than it is in the equatorial and mid-latitude regions. The point where the pressure and temperature allows the water to appear in all its three phases is the transition point between the sub-polar and polar region. This transition point is known as the triple point.