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Questions and Answers
What is the term for the state of balance in the body?
What is the term for the state of balance in the body?
- Hypoglycemia
- Hyperglycemia
- Ectotherm
- Homeostasis (correct)
What is the term for animals whose body temperature fluctuates with the environment?
What is the term for animals whose body temperature fluctuates with the environment?
- Thermoregulator
- Endotherm
- Ectotherm (correct)
- Homeotherm
What is the term for a response that intensifies a variable?
What is the term for a response that intensifies a variable?
- Positive Feedback (correct)
- Negative Feedback
- Homeostasis
- Regulation
What hormone causes the liver to release glucose into the blood?
What hormone causes the liver to release glucose into the blood?
What is the term for a response that counteracts a variable to maintain homeostasis?
What is the term for a response that counteracts a variable to maintain homeostasis?
In a negative feedback system to regulate blood sugar, what is the role of the counteracting response?
In a negative feedback system to regulate blood sugar, what is the role of the counteracting response?
Which of the following animals is considered a warm-blooded 'Endotherm'?
Which of the following animals is considered a warm-blooded 'Endotherm'?
What does hyperglycemia commonly lead to?
What does hyperglycemia commonly lead to?
Why does the body of a cold-blooded 'Ectotherm' fluctuate with the environment?
Why does the body of a cold-blooded 'Ectotherm' fluctuate with the environment?
What is the main function of Glucagon in the body?
What is the main function of Glucagon in the body?
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Study Notes
Homeostasis
- Homeostasis is a state of balance, where the body maintains a stable internal environment despite changes in the external environment.
- Examples of homeostasis include:
- Maintaining blood pH level within a certain range.
- Regulating blood glucose levels within a certain range.
- Maintaining internal body temperature within a certain range.
Blood Sugar Regulation
- Hyperglycemia is a condition where blood glucose levels are too high, which can lead to diabetes.
- Hypoglycemia is a condition where blood glucose levels are too low, indicating a lack of insulin.
- Glucagon is a hormone that causes the liver to release glucose into the blood.
Thermoregulation
- Cold-blooded, or ectothermic, animals have body temperatures that fluctuate with the environment.
- Examples of cold-blooded animals include amphibians, reptiles, and insects.
- Warm-blooded, or endothermic, animals maintain a constant internal body temperature, regardless of the environment.
- Examples of warm-blooded animals include mammals and birds.
Feedback Mechanisms
- Negative feedback occurs when a variable triggers a counteracting response to maintain homeostasis.
- Examples of negative feedback include:
- Blood sugar regulation
- Temperature regulation
- Blood pressure regulation
- Positive feedback occurs when a variable intensifies a response, leading to an increase in the variable.
- Examples of positive feedback include:
- Childbirth
- Digestion
- Lactation
Variables
- A variable is a factor that can throw the body out of balance.
- Variables can trigger negative feedback mechanisms to maintain homeostasis.
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