What is the role of a receptor in helping an organism maintain homeostasis?
10 points
Receives messages sent by the control center
Carries out a response to restore internal conditions
Detects stimuli and sends information to the control center
Compares current conditions with ideal values for those conditions
2. Which of these does homeostasis most directly relate?
10 points
Scale and structure
Interacting systems
3. Which of these is an example of a positive feedback loop?
10 points
Plants closing their stomata in response to water loss
The removal of salt from a saltwater fish during osmoregulation
The release of glucose by the liver in response to low blood sugar
Platelets stimulating the activation of more platelets during clotting
4. Internal control systems maintain homeostasis by regulating which of these?
10 points
pH of body fluids
External conditions
Receptors in the body
The body's control centers
5. On a hot day, which of these is an outward sign that thermoregulation is taking place?
10 points
Dry mouth
Slow breathing
6. How does the liver help to regulate glucose levels in the blood?
10 points
By storing glucose
By producing insulin
By releasing glucagon
By excreting excess water
7. The body works to maintain homeostasis in response to what conditions?
10 points
Tissue and cell formation
Productions of key vitamins
Internal and external changes
Cell differentiation and determination
8. Which of the following are most important for an organism to maintain homeostasis?
10 points
reproduction and development
dependence on other organisms
behaviors and negative feedback
interactions with nonliving things
9. The body’s internal environment must stay __________.
10 points
exactly the same at all times
the same as its external environment
within narrow ranges that support human life
away from sudden outside temperature changes
10. The long-term effects of a disruption of homeostasis include __________.
10 points
destruction of organ systems
the immune system’s taking control
regulation of the internal environment
establishment of feedback mechanisms

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