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Questions and Answers
How is homeostasis maintained in cells?
How is homeostasis maintained in cells?
- Through positive feedback loops
- By increasing environmental changes
- Through negative feedback loops (correct)
- By shutting down all cellular processes
What happens when the body temperature of humans goes above the homeostatic level?
What happens when the body temperature of humans goes above the homeostatic level?
- Sweating and dilation of blood vessels in extremities occur (correct)
- The body temperature continues to rise indefinitely
- The body stops all cooling mechanisms
- Shivering and constriction of blood vessels occur
What triggers the pancreas to release insulin in animals?
What triggers the pancreas to release insulin in animals?
- Elevated body temperature
- Falling blood glucose levels
- Rising blood glucose levels (correct)
- Increased blood pressure
What is the optimal body temperature for humans?
What is the optimal body temperature for humans?
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Which of the following is NOT an example of homeostasis?
Which of the following is NOT an example of homeostasis?
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What is the main organelle responsible for maintaining homeostasis?
What is the main organelle responsible for maintaining homeostasis?
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What is the process of water moving from a high concentration of water to a low concentration of water called?
What is the process of water moving from a high concentration of water to a low concentration of water called?
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What helps regulate how much water moves into and out of the cell?
What helps regulate how much water moves into and out of the cell?
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What does the cell use to pump sodium ions outside the cell and potassium ions into the cell?
What does the cell use to pump sodium ions outside the cell and potassium ions into the cell?
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What regulates ion channels in the cell membrane, allowing for finer levels of control?
What regulates ion channels in the cell membrane, allowing for finer levels of control?
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