Mastering Body Temperature Regulation Through Hypothalamic Control

The video explains how the hypothalamus regulates body temperature through heat gain and loss mechanisms. When body temperature is low, the heat gain center in the posterior hypothalamus stimulates shivering and increases metabolic rate to produce heat. Vasoconstriction reduces heat loss. Conversely, when body temperature is high, the heat loss center in the anterior hypothalamus promotes sweating and vasodilatation to dissipate heat. These processes ensure the body maintains a stable temperature of 37°C (98.6°F).

What part of the brain is responsible for regulating body temperature?

• Cerebrum

• Medulla Oblongata

• Hypothalamus

• Cerebellum

Which center in the hypothalamus is activated when the body temperature is too low?

• Heat loss center

• Vasodilation center

• Heat gain center

• Thermoregulatory center

How does the body increase heat production when the temperature drops?

• By decreasing metabolic rate

• By increasing sweating

• By shivering and increasing metabolic rate

• By vasodilation

What is the effect of cutaneous vasoconstriction on the body?

• Increases blood flow to the skin

• Decreases metabolic rate

• Decreases blood flow to the skin

• Increases sweating

What happens to sweat glands during cutaneous vasoconstriction?

• They become more active

• They become inactive

• They increase sweat production

• They widen blood vessels

Which center is activated when the body temperature is too high?

• Heat gain center

• Vasoconstriction center

• Thermoregulatory center

• Heat loss center

What is the role of cutaneous vasodilatation in temperature regulation?

• Decreases blood flow to the skin

• Increases metabolic rate

• Increases blood flow to the skin

• Decreases sweating

How does the body lose heat when the temperature is high?

• By vasoconstriction

• By decreasing metabolic rate

• By shivering

• By increasing sweating and vasodilatation

What happens to metabolic rate when body temperature is high?

• It remains constant

• It decreases

• It increases

• It fluctuates

Which part of the hypothalamus is involved in inhibiting sympathetic activity?

• Posterior hypothalamus

• Anterior hypothalamus

• Lateral hypothalamus

• Medial hypothalamus