Question

In rabbit, conservation of heat and maintenance of body temperature is controlled by

• A. Pilli-erection of hairs
• B. Increased output of the adrenaline
• C. Shivering
• D. All of the above

Answer 1

The correct option is D All of the above

In humans and other mammals, temperature regulation represents the balance between heat production from metabolic sources and heat loss from evaporation (perspiration). When the environment is cold, the body heat is conserved first by constriction of blood vessels near the body surface and then by the waves of muscle contractions, or shivering, which help to increase metabolism. Shivering results in five fold increase in metabolism. Another heat-conserving mechanism is goose bumps, or piloerection, which raises the body hairs. This increases the thickness of the insulating fur or feather layer.