Question

Narrowing of blood vessels takes place at __________.

Answer 1

Blood vessels are networks of hollow tubes that transport blood to and from all areas of the body, comparable to pipes. Blood flows in both directions through these veins, one from the heart to the rest of the body and the other from the rest of the body to the heart. The network of blood vessels in the human body is made up of capillaries, veins, and arteries.

Complete answer:
To answer this question one should know the meaning of narrowing of blood vessels.
Narrowing of blood vessels is known as vasoconstriction and it leads to increase in blood pressure.
Low temperatures cause blood vessels to constrict.
The blood vessels narrow or vasoconstrict when the temperature is low. The blood flow to the skin is reduced as a result. Convection, conduction, and radiation all lead to loss of heat through the body.
Cold exposure activates the skin's cold receptors, resulting in cold thermal sensations and sympathetic nervous system activation. Vasoconstriction occurs as a result of sympathetic activation in the skin, arms, and legs.

Narrowing of blood vessels takes place at low temperature.

Additional information:
Blood vessels are important for gas exchange and the movement of different chemicals throughout the body. Furthermore, blood vessels aid in the capacity of an organism to keep a constant internal temperature.

Note:
In general, blood pressure rises in the winter and falls in the summer. Because cold temperatures cause your blood vessels to constrict, more pressure is required to move blood through your constricted veins and arteries, which raises blood pressure. In addition, a sudden shift in weather patterns, such as a weather front or a storm, can influence blood pressure.