Which response is associated with the posterior zone of temperature regulation?

Which response is associated with the posterior zone of temperature regulation?

• A. Sweating and vasodilation
• B. Shivering and vasoconstriction
• C. Increased metabolic rate
• D. Urination

Answer: (B)

In thermoregulation, the posterior region of the hypothalamus governs heat production and conservation. When exposed to cold, it activates mechanisms to raise core temperature, with shivering increasing heat production through rapid muscle contractions and vasoconstriction reducing heat loss by limiting blood flow to the skin. This pairing directly reflects the posterior zone’s role. Sweating and vasodilation promote cooling and are linked to the anterior region; increasing metabolic rate and urination don’t fit as immediate posterior-zone responses.

In thermoregulation, the posterior region of the hypothalamus governs heat production and conservation. When exposed to cold, it activates mechanisms to raise core temperature, with shivering increasing heat production through rapid muscle contractions and vasoconstriction reducing heat loss by limiting blood flow to the skin. This pairing directly reflects the posterior zone’s role. Sweating and vasodilation promote cooling and are linked to the anterior region; increasing metabolic rate and urination don’t fit as immediate posterior-zone responses.