Understanding Thermoregulation

What is the primary reason for maintaining our body temperature at around 37 degrees Celsius?

• To facilitate proper enzyme function

• To reduce water loss

• To ensure optimal blood flow

• To increase metabolic rate

What is the primary function of homeostasis in the human body?

• To ensure consistent oxygen levels

• To maintain a stable internal environment

• To regulate blood sugar levels

• To maintain a stable psychological state

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

• Cerebellum

• Hypothalamus

• Cerebral cortex

• Medulla oblongata

What is the role of receptors in thermoregulation?

• To regulate blood sugar levels

• To produce hormones

• To detect changes in body temperature

• To control blood pressure

What process helps to conserve body heat by reducing blood flow near the skin surface?

• Hyperextension

• Vasodilation

• Vasoconstriction

• Hyperventilation

How does shivering contribute to warming the body?

• By decreasing heart rate

• By generating heat through muscle contractions

• By increasing respiration rate

• By reducing muscle activity

What is the function of erector muscles in response to cold?

• They relax to flatten hairs

• They contract to make hairs stand on end

• They decrease sweat production

• They increase blood flow to the skin

Which mechanism does the body use to cool down during high temperatures?

• Shivering

• Vasoconstriction

• Sweating

• Hair erection

What is the effect of vasodilation in thermoregulation?

• It conserves body heat

• It increases body heat

• It reduces body heat

• It stabilizes body heat

How does the evaporation of sweat help in cooling the body?

• By using body heat to evaporate water

• By blocking UV rays from the sun

• By releasing heat into the environment

• By absorbing heat from the environment