Question
Download Solution PDFThe temperature regulation of the body is influenced by
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is All of these
Explanation:
The regulation of body temperature, known as thermoregulation, is a critical physiological process that maintains a stable internal environment despite external temperature changes. It is controlled by a combination of neuronal and hormonal mechanisms, along with inputs from temperature receptors in the skin and the brain's heat regulation centers.
- Temperature receptors of the skin:
- These receptors are specialized nerve endings that detect changes in external temperature and send signals to the brain. They play a crucial role in initiating appropriate responses such as sweating or shivering to maintain body temperature.
- Temperature of the blood circulating the heat regulation centers of the brain:
- The hypothalamus, particularly its preoptic area, acts as the body's thermostat. It monitors the temperature of blood flowing through it. When blood temperature deviates from the set point, the hypothalamus triggers responses like vasodilation (to cool down) or vasoconstriction (to preserve heat).
- Both neuronal and hormonal control:
- Neuronal control includes the activation of autonomic nervous system pathways, leading to responses like sweating, shivering, or altering blood flow. Hormonal control involves hormones such as thyroxine and adrenaline. For example, thyroxine increases metabolic rate, which produces heat.
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