H9: Internal regulation
9.1 Temperature regulation
Multiple choice questions
1. What is the function of homeostasis?
A. To keep body variables within a fixed range
B. To increase body temperature
C. To generate body heat
D. To lower the set point for body temperature
2. What is the set point in homeostasis?
A. The maximum value the body works to maintain
B. A single value the body works to maintain
C. The fluctuating range of body variables
D. The point where the body stops responding to disturbances
3. Which of the following best describes negative feedback?
A. It amplifies disturbances in the body
B. It maintains body variables within a fixed range
C. It causes disturbances in the body
D. It stops the body from responding to disturbances
4. How does allostasis differ from homeostasis?
A. Allostasis maintains body variables within a fixed range
B. Allostasis corrects disturbances in the body
C. Allostasis anticipates needs and avoids errors
D. Allostasis relies solely on negative feedback
5. What is basal metabolism?
A. The energy used to maintain a constant body temperature while at
rest
B. The energy used during vigorous physical activity
C. The energy used to generate body heat
D. The energy used to regulate blood flow to the skin
6. What characterizes ectothermic animals?
A. They generate body heat internally
B. They regulate body heat using physiological mechanisms
C. They depend on external sources for body heat
D. They have a nearly constant core temperature
7. How do ectothermic animals regulate their body heat?
A. By sweating
B. By shivering
C. By moving between sun, shade, and burrows
D. By increasing blood flow to the skin
, 8. Which of the following is a strategy for staying warm in cold
environments?
A. Sweating
B. Fluffing fur to decrease insulation
C. Decreased blood flow to the skin
D. Muscle relaxation
9. What is the primary mechanism for cooling off in warm environments?
A. Shivering
B. Decreased blood flow to the skin
C. Sweating
D. Fluffing fur to increase insulation
10. What is the purpose of fever in response to infection?
A. To lower the body's set point for temperature
B. To reduce immune system activity
C. To increase protein stability
D. To help the immune system work more vigorously
Open questions
1. What is the difference between homeostasis and allostasis?
2. How do ectothermic animals regulate their body temperature?
3. What strategies do endothermic animals use to cope with cold
environments?
4. Why is maintaining a constant core body temperature essential for
birds and mammals?
5. How does fever help the body fight infections, and what are the risks
associated with high fevers?
9.2 Thirst
Multiple choice questions
1. What is the primary function of vasopressin?
A. To decrease blood pressure by dilating blood vessels
B. To increase blood volume by promoting water excretion
C. To raise blood pressure by constricting blood vessels
D. To regulate blood sugar levels
2. What role does antidiuretic hormone (ADH) play in the kidneys?
A. It promotes water excretion by the kidneys
B. It inhibits the reabsorption of water from urine
C. It enables the kidneys to reabsorb water from urine
D. It decreases blood pressure by constricting blood vessels
9.1 Temperature regulation
Multiple choice questions
1. What is the function of homeostasis?
A. To keep body variables within a fixed range
B. To increase body temperature
C. To generate body heat
D. To lower the set point for body temperature
2. What is the set point in homeostasis?
A. The maximum value the body works to maintain
B. A single value the body works to maintain
C. The fluctuating range of body variables
D. The point where the body stops responding to disturbances
3. Which of the following best describes negative feedback?
A. It amplifies disturbances in the body
B. It maintains body variables within a fixed range
C. It causes disturbances in the body
D. It stops the body from responding to disturbances
4. How does allostasis differ from homeostasis?
A. Allostasis maintains body variables within a fixed range
B. Allostasis corrects disturbances in the body
C. Allostasis anticipates needs and avoids errors
D. Allostasis relies solely on negative feedback
5. What is basal metabolism?
A. The energy used to maintain a constant body temperature while at
rest
B. The energy used during vigorous physical activity
C. The energy used to generate body heat
D. The energy used to regulate blood flow to the skin
6. What characterizes ectothermic animals?
A. They generate body heat internally
B. They regulate body heat using physiological mechanisms
C. They depend on external sources for body heat
D. They have a nearly constant core temperature
7. How do ectothermic animals regulate their body heat?
A. By sweating
B. By shivering
C. By moving between sun, shade, and burrows
D. By increasing blood flow to the skin
, 8. Which of the following is a strategy for staying warm in cold
environments?
A. Sweating
B. Fluffing fur to decrease insulation
C. Decreased blood flow to the skin
D. Muscle relaxation
9. What is the primary mechanism for cooling off in warm environments?
A. Shivering
B. Decreased blood flow to the skin
C. Sweating
D. Fluffing fur to increase insulation
10. What is the purpose of fever in response to infection?
A. To lower the body's set point for temperature
B. To reduce immune system activity
C. To increase protein stability
D. To help the immune system work more vigorously
Open questions
1. What is the difference between homeostasis and allostasis?
2. How do ectothermic animals regulate their body temperature?
3. What strategies do endothermic animals use to cope with cold
environments?
4. Why is maintaining a constant core body temperature essential for
birds and mammals?
5. How does fever help the body fight infections, and what are the risks
associated with high fevers?
9.2 Thirst
Multiple choice questions
1. What is the primary function of vasopressin?
A. To decrease blood pressure by dilating blood vessels
B. To increase blood volume by promoting water excretion
C. To raise blood pressure by constricting blood vessels
D. To regulate blood sugar levels
2. What role does antidiuretic hormone (ADH) play in the kidneys?
A. It promotes water excretion by the kidneys
B. It inhibits the reabsorption of water from urine
C. It enables the kidneys to reabsorb water from urine
D. It decreases blood pressure by constricting blood vessels
