Regulation of Internal Environment in Animals
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Questions and Answers

What is the primary function of feedback control in animals?

  • To respond to external environmental changes
  • To maintain the internal environment (correct)
  • To adapt to external stimuli
  • To regulate body growth and development

    • What is the difference between a regulator and a conformer?

  • A regulator is a type of fish, while a conformer is a type of mammal
  • A regulator maintains internal conditions despite external changes, while a conformer does not (correct)
  • A regulator is an animal that adapts to environmental changes, while a conformer does not
  • A regulator is an animal that lives in extreme environments, while a conformer does not

    • What can be said about the river otter’s body temperature?

  • It is always higher than the surrounding water temperature
  • It changes greatly with the surrounding water temperature
  • It is largely independent of the surrounding water temperature (correct)
  • It is always lower than the surrounding water temperature

    • What is an example of the largemouth bass conforming to its environment?

    <p>Its body warming or cooling with the water temperature</p> Signup and view all the answers

    What can be said about the largemouth bass’s solute concentration in its blood?

    <p>It is regulated, but its body temperature is not</p> Signup and view all the answers

    What is an example of an animal regulating some internal conditions while allowing others to conform to the environment?

    <p>The largemouth bass regulating its solute concentration and conforming to water temperature</p> Signup and view all the answers

    What is the primary role of positive feedback loops in animals?

    <p>To drive processes to completion</p> Signup and view all the answers

    What stimulates the uterus to contract during childbirth?

    <p>The pressure of the baby's head against sensors near the opening of the uterus</p> Signup and view all the answers

    What is an example of a regulated change in homeostasis during a particular stage in life?

    <p>The radical shift in hormone balance during puberty</p> Signup and view all the answers

    What is the term for the physiological changes that occur roughly every 24 hours?

    <p>Circadian rhythm</p> Signup and view all the answers

    How much does the body temperature typically undergo a cyclic rise and fall in every 24-hour period?

    <p>More than 0.6°C (1°F)</p> Signup and view all the answers

    What is the term for the changes in the internal environment that are essential to normal body functions?

    <p>Regulated changes</p> Signup and view all the answers

    What is the main concept referred to as the maintenance of internal balance in animals?

    <p>Homeostasis</p> Signup and view all the answers

    Which of the following is an example of homeostasis in humans?

    <p>Regulating body temperature at 37°C</p> Signup and view all the answers

    What is the term used to describe the relatively constant internal environment maintained by homeostasis?

    <p>Steady State</p> Signup and view all the answers

    What type of feedback is involved in homeostasis?

    <p>Negative Feedback</p> Signup and view all the answers

    What is the function of a thermostat in a home heating system?

    <p>To regulate room temperature</p> Signup and view all the answers

    What is the purpose of physiological buffers in homeostasis?

    <p>To reduce fluctuations in pH</p> Signup and view all the answers

    What is the term used to describe the internal environment of an animal?

    <p>Internal Environment</p> Signup and view all the answers

    What is the response to a stimulus in homeostasis?

    <p>The triggering of a physiological activity</p> Signup and view all the answers

    What is an example of a normal range in homeostasis?

    <p>A range of 19°C to 21°C</p> Signup and view all the answers

    What is the purpose of insulation in homeostasis?

    <p>To reduce fluctuations in temperature</p> Signup and view all the answers

    What is the primary function of an animal being a regulator for an environmental variable?

    <p>It uses internal mechanisms to control internal change.</p> Signup and view all the answers

    What can be said about the body temperature of the river otter?

    <p>It remains relatively constant despite changes in the surrounding water temperature.</p> Signup and view all the answers

    What is an example of an animal conforming to its environment?

    <p>The largemouth bass's body temperature.</p> Signup and view all the answers

    What is the difference between a regulator and a conformer?

    <p>A regulator uses internal mechanisms to control internal change, while a conformer allows its internal condition to change with external changes.</p> Signup and view all the answers

    What is an example of an animal regulating some internal conditions while allowing others to conform to the environment?

    <p>The largemouth bass regulating its solute concentration in its blood and interstitial fluid.</p> Signup and view all the answers

    What is the purpose of feedback control in animals?

    <p>To regulate internal conditions in response to external changes.</p> Signup and view all the answers

    What is the primary role of positive feedback loops in animals?

    <p>To drive processes to completion</p> Signup and view all the answers

    What is an example of a regulated change in the internal environment?

    <p>Radical shift in hormone balance during puberty</p> Signup and view all the answers

    What is the term used to describe the physiological changes that occur roughly every 24 hours?

    <p>Circadian rhythm</p> Signup and view all the answers

    What stimulates the uterus to contract during childbirth?

    <p>Pressure of the baby's head</p> Signup and view all the answers

    What is an example of a cyclic alteration in metabolism?

    <p>Variation in hormone levels responsible for a woman's menstrual cycle</p> Signup and view all the answers

    How much does the body temperature typically undergo a cyclic rise and fall in every 24-hour period?

    <p>More than 0.6°C (1°F)</p> Signup and view all the answers

    What is the primary way in which animals achieve homeostasis?

    <p>By maintaining a variable, such as body temperature or solute concentration, at or near a particular value, or set point</p> Signup and view all the answers

    What is the role of a sensor in the control system of homeostasis?

    <p>To detect a stimulus, such as a change in temperature or solute concentration</p> Signup and view all the answers

    What is the effect of negative feedback on a stimulus?

    <p>It reduces the stimulus</p> Signup and view all the answers

    What is the purpose of adaptations that reduce fluctuations in homeostasis?

    <p>To maintain a steady state</p> Signup and view all the answers

    What is the difference between a set point and a normal range in homeostasis?

    <p>A set point is a specific value, while a normal range is a range of values</p> Signup and view all the answers

    What is the result of homeostasis on the internal environment?

    <p>A moderation of changes in the internal environment</p> Signup and view all the answers

    What is the role of the control center in the control system of homeostasis?

    <p>To generate output that triggers a response</p> Signup and view all the answers

    What is an example of an animal exhibiting homeostasis for a range of physical and chemical properties?

    <p>A human maintaining a constant body temperature and pH</p> Signup and view all the answers

    What is the dynamic equilibrium that occurs in homeostasis?

    <p>A balance between internal and external factors</p> Signup and view all the answers

    What is the purpose of a physiological response to a stimulus in homeostasis?

    <p>To reduce the stimulus</p> Signup and view all the answers

    What is the main difference between an animal that regulates and one that conforms to its environment?

    <p>The way they control their internal environment</p> Signup and view all the answers

    What can be said about the river otter and the largemouth bass in terms of body temperature?

    <p>The otter is a regulator and the bass is a conformer</p> Signup and view all the answers

    What is the role of internal mechanisms in an animal that regulates its internal environment?

    <p>To control internal changes in the face of external fluctuations</p> Signup and view all the answers

    What can be said about the largemouth bass in terms of solute concentration in its blood and interstitial fluid?

    <p>It regulates the solute concentration</p> Signup and view all the answers

    What is the result of an animal managing its internal environment?

    <p>A regulated internal environment</p> Signup and view all the answers

    What is the relationship between an animal's internal environment and external fluctuations in conformers?

    <p>The internal environment changes in response to external fluctuations</p> Signup and view all the answers

    What is the purpose of positive feedback loops in animals?

    <p>To drive processes to completion</p> Signup and view all the answers

    What is an example of a regulated change in the internal environment during a particular stage in life?

    <p>Puberty</p> Signup and view all the answers

    What is the term used to describe the physiological changes that occur roughly every 24 hours?

    <p>Circadian rhythm</p> Signup and view all the answers

    What is an example of a cyclic alteration in metabolism?

    <p>Circadian rhythm</p> Signup and view all the answers

    What happens when the baby's head presses against sensors near the opening of the mother's uterus during childbirth?

    <p>The uterus contracts</p> Signup and view all the answers

    What is the result of the feedback loop during childbirth?

    <p>The baby is born quickly</p> Signup and view all the answers

    What is the main purpose of homeostasis in animals?

    <p>To maintain a relatively constant internal environment despite changes in the external environment</p> Signup and view all the answers

    What is the role of a sensor in a control system of homeostasis?

    <p>To detect changes in the internal environment</p> Signup and view all the answers

    What is an example of negative feedback in homeostasis?

    <p>Sweating to decrease body temperature</p> Signup and view all the answers

    What is the term used to describe the stable internal environment maintained by homeostasis?

    <p>Steady state</p> Signup and view all the answers

    What is the purpose of physiological buffers in homeostasis?

    <p>To reduce fluctuations in pH</p> Signup and view all the answers

    What is an example of an animal that conforms to its environment?

    <p>Spider crab</p> Signup and view all the answers

    What is the difference between a set point and a normal range in homeostasis?

    <p>A set point is a specific value, while a normal range is a range of values</p> Signup and view all the answers

    What is the primary function of adaptations that reduce fluctuations in homeostasis?

    <p>To reduce fluctuations in the internal environment</p> Signup and view all the answers

    What is the type of feedback involved in homeostasis?

    <p>Negative feedback</p> Signup and view all the answers

    What is the main concept referred to as the maintenance of internal balance in animals?

    <p>Homeostasis</p> Signup and view all the answers

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