7.11B - **Biology Only** Thermoregulation and 7.12B - **Higher and Biology Only** Thermoregulation and Blood Vessels Flashcards
Where is the thermoregulatory centre located?
The thermoregulatory centre is found in the hypothalamus of the brain.
What does the thermoregulatory centre monitor?
It monitors and controls body temperature.
What type of receptors does the thermoregulatory centre have?
It has receptors that monitor the temperature of the blood and receptors in the skin that send impulses to the thermoregulatory centre.
What is the average human body temperature?
The average human body temperature is 37.5 degrees Celsius.
What happens if body temperature becomes too high?
Sweat is produced from sweat glands, and vasodilation occurs.
How does sweating help regulate body temperature?
Sweat evaporates from the skin surface, resulting in increased energy transfer away from the body.
Sweat glands are located in the dermis layer of the skin, and sweat is released onto the surface of the epidermis.
What is vasodilation?
Vasodilation means more blood flows closer to the surface of the skin, resulting in increased energy transfer from the body.
What happens if body temperature decreases too much?
Sweating stops, skeletal muscles contract rapidly (shivering), hairs stand on end, and vasoconstriction occurs.
What is shivering?
Shivering is the rapid contraction of skeletal muscles to generate heat from respiration.
How do hairs help regulate body temperature?
Hairs stand on end to create an insulating layer, trapping warm air.
What is vasoconstriction?
Vasoconstriction means blood does not flow so close to the surface, resulting in less heat lost.
