Homeostasis

Review Questions

When faced with a sudden drop in environmental temperature, an endothermic animal will:

  1. experience a drop in its body temperature
  2. wait to see if it goes lower
  3. increase muscle activity to generate heat
  4. add fur or fat to increase insulation

Hint:

C

Which is an example of negative feedback?

  1. lowering of blood glucose after a meal
  2. blood clotting after an injury
  3. lactation during nursing
  4. uterine contractions during labor

Hint:

A

Which method of heat exchange occurs during direct contact between the source and animal?

  1. radiation
  2. evaporation
  3. convection
  4. conduction

Hint:

D

The body’s thermostat is located in the ________.

  1. homeostatic receptor
  2. hypothalamus
  3. medulla
  4. vasodilation center

Hint:

B

Which of the following is not true about acclimatization?

  1. Acclimatization allows animals to compensate for changes in their environment.
  2. Acclimatization improves function in a new environment.
  3. Acclimatization occurs when an animal tries to reestablish a homeostatic set point.
  4. Acclimatization is passed on to offspring of acclimated individuals.

Hint:

D

Which of the following is not a way that ectotherms can change their body temperatures?

  1. Sweating for evaporative cooling.
  2. Adjusting the timing of their daily activities.
  3. Seek out or avoid direct sunlight.
  4. Huddle in a group.

Hint:

A