GCSE Biology - How We Control Our Body Temperature #55

The video explains the regulation of internal body temperature, emphasizing the importance of maintaining a stable temperature of 37°C for optimal enzyme function. It describes the role of the hypothalamus and thermoregulatory sensors in detecting temperature changes and initiating responses to either warm up or cool down the body. Mechanisms such as vasoconstriction, shivering, vasodilation, and sweating are detailed as methods to conserve or release heat, ensuring homeostasis.

What is the primary reason our body needs to maintain a temperature of around 37°C?

• To regulate heart rate

• To maintain blood pressure

• To ensure proper enzyme function

• To prevent dehydration

Which part of the brain acts as a thermostat for our body?

• Medulla oblongata

• Hypothalamus

• Cerebrum

• Cerebellum

What is the process called when blood vessels near the skin surface constrict to conserve heat?

• Vasodilation

• Vasoconstriction

• Thermogenesis

• Homeostasis

How does shivering help in warming up the body?

• By using energy from respiration

• By increasing blood flow

• By reducing heat loss

• By directly producing heat

What role does sweating play in cooling down the body?

• It increases blood flow to the skin

• It traps heat within the body

• It evaporates and removes heat energy

• It constricts blood vessels