Which statement accurately describes the function of a hormone produced by the adrenal glands?
a. cortisol causes the heart rate and blood pressure to rise.
b. norepinephrine regulates blood volume and pressure.
c. epinephrine widens the air passageways in the lungs.
d. aldosterone control metabolism of carbohydrates, fats, and proteins.

Option B,  Norepinephrine regulates blood volume and pressure.

Explanation:

The adrenal medulla releases hormones after the stimulation of sympathetic nervous system during the stressful situation and helps us in dealing with physical and emotional stress. They are also essential during the fight-or-flight response occurring as a result of a threatening situation

The major hormones released by adrenal medulla are:

a) Epinephrine it is also known as adrenaline which increases the heart rate and blood flow through the muscles and brain and lead to conversion of glycogen to glucose in the liver

b) Norepinephrine- It is known as nor-adrenaline which also respond to stress and causes vasoconstriction i.e narrowing of blood vessels and thus causes high blood pressure.

Hence, option B is correct

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.