D3.3 Homeostasis (Organisms): Practice Questions

• a.A mechanism that prevents any chemical reactions from occurring in the body.
• b.A change in a variable triggers a response that counteracts the initial change.
• c.A change in a variable triggers a response that amplifies the initial change.
• d.A process where the output of a system is independent of the input signals.

• a.

  It triggers vasodilation, leading to rapid heat loss

• b.

  It increases the set point in the hypothalamus, causing a fever

• c.

  It reduces metabolic heat production, leading to a lower body temperature

• d.

  It causes excessive shivering, which increases core temperature

• a.

  Type 2 diabetes caused by insulin resistance in target cells

• b.

  Thyroid deficiency caused by a lack of iodine in the diet

• c.

  Type 1 diabetes caused by the inability of the pancreas to produce insulin

• d.

  Type 1 diabetes caused by the destruction of alpha cells

• a.Ensuring that the internal environment remains completely static and unchanging.
• b.Allowing the internal temperature to fluctuate wildly with the surrounding climate.
• c.Maintaining the internal environment within narrow limits despite external changes.
• d.Maximizing the metabolic rate regardless of the energy availability.

• a.Cerebellum
• b.Medulla oblongata
• c.Thalamus
• d.Hypothalamus

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.