Question

Which of the following events occurs during Phase B to raise body temperature to hypothalamus set point?

• A. Shivering
• B. Sweating
• C. Decrease in thermogenesis
• D. Cutaneous vasodilation

Hint:

Shivering is a protective mechanism activated by the body when it needs to increase its temperature, especially in cold conditions.

Answer 1

The Correct Option is A

The question is asking about the physiological changes that occur during Phase B to raise the body temperature to match the hypothalamus set point. Let's explore the options one by one:

1. Shivering: Shivering is an involuntary contraction of muscles, which generates heat in the body. It is a common physiological response to cold environments and helps in raising body temperature. This is a correct response for increasing body temperature to align with the hypothalamic set point.
2. Sweating: Sweating is the process of releasing sweat to cool down the body. It helps in lowering the body temperature, which is opposite to the requirement in this context, making it an incorrect option.
3. Decrease in thermogenesis: Decreasing thermogenesis would reduce heat production in the body, further lowering the body temperature. Hence, it is not an action taken to raise the temperature, making it an incorrect choice.
4. Cutaneous vasodilation: This is the widening of blood vessels near the skin, which increases blood flow and facilitates heat loss from the body. This action is suitable for decreasing body temperature, not increasing it. Therefore, it is not the correct option.

Based on the analysis, Shivering is the correct answer as it aligns with the physiological need to raise body temperature to the hypothalamic set point during cold conditions.