Temperature regulation feedback mechanism

What is a feedback mechanism in an organism?

• When you get notes for revision on a lab

• The body's system of noticing changes and adjusting processes to restore balance

• When a disruption in homeostasis causes disease

• When you breathe faster in order to cool down

What condition is being regulated in the diagram?

• Brain function

• Blood oxygen concentration

• Level of blood sugar

• Body temperature

What processes does the body adjust when the the hypothalamus sends signals to heat up (because it's cold)?

• normal body temperature

• shivering and blood vessels constricting

• blood vessels constrict and blood vessels dilate

• shivering and sweating

According to the diagram, which body structure contains the hypothalamus?

• the brain

• the skin

• blood vessels

• heart

How does the hypothalamus respond when the body temperature is too high?

• the hypothalamus releases adrenaline

• the hypothalamus sends a signal to shiver

• the hypothalamus sends a signal to the sweat glands and blood vessels

• nothing - your skin doesn't need nervous system signals

What is one immediate effect of the hypothalamus sending signals to heat the body?

• Blood vessels dilate (widen) to release heat

• The person cools off

• Blood vessels constrict (shrink) to reduce heat loss

• Body temperature automatically decreases

What is another immediate effect of the hypothalamus sending signals to heat the body?

• Normal body temperature

• The hypothalamus senses body temperature

• Shivering to generate heat

• Sweat glands increase sweat production

How does sweating and blood vessel dilation during exercise affect the body's temperature homeostasis?

• Restoring homeostasis by cooling you off

• Disrupting homeostasis by cooling you off

• Disrupting homeostasis by warming you up

• Restoring homeostaasis by warming you up

In this diagram, what do the arrows represent?

• Blood vessels

• Many generations passing

• Molecules moving

• Cause and effect