66 Questions
What is the primary function of feedback control in animals?
To maintain the internal environment
What is the difference between a regulator and a conformer?
A regulator maintains internal conditions despite external changes, while a conformer does not
What can be said about the river otter’s body temperature?
It is largely independent of the surrounding water temperature
What is an example of the largemouth bass conforming to its environment?
Its body warming or cooling with the water temperature
What can be said about the largemouth bass’s solute concentration in its blood?
It is regulated, but its body temperature is not
What is an example of an animal regulating some internal conditions while allowing others to conform to the environment?
The largemouth bass regulating its solute concentration and conforming to water temperature
What is the primary role of positive feedback loops in animals?
To drive processes to completion
What stimulates the uterus to contract during childbirth?
The pressure of the baby's head against sensors near the opening of the uterus
What is an example of a regulated change in homeostasis during a particular stage in life?
The radical shift in hormone balance during puberty
What is the term for the physiological changes that occur roughly every 24 hours?
Circadian rhythm
How much does the body temperature typically undergo a cyclic rise and fall in every 24-hour period?
More than 0.6°C (1°F)
What is the term for the changes in the internal environment that are essential to normal body functions?
Regulated changes
What is the main concept referred to as the maintenance of internal balance in animals?
Homeostasis
Which of the following is an example of homeostasis in humans?
Regulating body temperature at 37°C
What is the term used to describe the relatively constant internal environment maintained by homeostasis?
Steady State
What type of feedback is involved in homeostasis?
Negative Feedback
What is the function of a thermostat in a home heating system?
To regulate room temperature
What is the purpose of physiological buffers in homeostasis?
To reduce fluctuations in pH
What is the term used to describe the internal environment of an animal?
Internal Environment
What is the response to a stimulus in homeostasis?
The triggering of a physiological activity
What is an example of a normal range in homeostasis?
A range of 19°C to 21°C
What is the purpose of insulation in homeostasis?
To reduce fluctuations in temperature
What is the primary function of an animal being a regulator for an environmental variable?
It uses internal mechanisms to control internal change.
What can be said about the body temperature of the river otter?
It remains relatively constant despite changes in the surrounding water temperature.
What is an example of an animal conforming to its environment?
The largemouth bass's body temperature.
What is the difference between a regulator and a conformer?
A regulator uses internal mechanisms to control internal change, while a conformer allows its internal condition to change with external changes.
What is an example of an animal regulating some internal conditions while allowing others to conform to the environment?
The largemouth bass regulating its solute concentration in its blood and interstitial fluid.
What is the purpose of feedback control in animals?
To regulate internal conditions in response to external changes.
What is the primary role of positive feedback loops in animals?
To drive processes to completion
What is an example of a regulated change in the internal environment?
Radical shift in hormone balance during puberty
What is the term used to describe the physiological changes that occur roughly every 24 hours?
Circadian rhythm
What stimulates the uterus to contract during childbirth?
Pressure of the baby's head
What is an example of a cyclic alteration in metabolism?
Variation in hormone levels responsible for a woman's menstrual cycle
How much does the body temperature typically undergo a cyclic rise and fall in every 24-hour period?
More than 0.6°C (1°F)
What is the primary way in which animals achieve homeostasis?
By maintaining a variable, such as body temperature or solute concentration, at or near a particular value, or set point
What is the role of a sensor in the control system of homeostasis?
To detect a stimulus, such as a change in temperature or solute concentration
What is the effect of negative feedback on a stimulus?
It reduces the stimulus
What is the purpose of adaptations that reduce fluctuations in homeostasis?
To maintain a steady state
What is the difference between a set point and a normal range in homeostasis?
A set point is a specific value, while a normal range is a range of values
What is the result of homeostasis on the internal environment?
A moderation of changes in the internal environment
What is the role of the control center in the control system of homeostasis?
To generate output that triggers a response
What is an example of an animal exhibiting homeostasis for a range of physical and chemical properties?
A human maintaining a constant body temperature and pH
What is the dynamic equilibrium that occurs in homeostasis?
A balance between internal and external factors
What is the purpose of a physiological response to a stimulus in homeostasis?
To reduce the stimulus
What is the main difference between an animal that regulates and one that conforms to its environment?
The way they control their internal environment
What can be said about the river otter and the largemouth bass in terms of body temperature?
The otter is a regulator and the bass is a conformer
What is the role of internal mechanisms in an animal that regulates its internal environment?
To control internal changes in the face of external fluctuations
What can be said about the largemouth bass in terms of solute concentration in its blood and interstitial fluid?
It regulates the solute concentration
What is the result of an animal managing its internal environment?
A regulated internal environment
What is the relationship between an animal's internal environment and external fluctuations in conformers?
The internal environment changes in response to external fluctuations
What is the purpose of positive feedback loops in animals?
To drive processes to completion
What is an example of a regulated change in the internal environment during a particular stage in life?
Puberty
What is the term used to describe the physiological changes that occur roughly every 24 hours?
Circadian rhythm
What is an example of a cyclic alteration in metabolism?
Circadian rhythm
What happens when the baby's head presses against sensors near the opening of the mother's uterus during childbirth?
The uterus contracts
What is the result of the feedback loop during childbirth?
The baby is born quickly
What is the main purpose of homeostasis in animals?
To maintain a relatively constant internal environment despite changes in the external environment
What is the role of a sensor in a control system of homeostasis?
To detect changes in the internal environment
What is an example of negative feedback in homeostasis?
Sweating to decrease body temperature
What is the term used to describe the stable internal environment maintained by homeostasis?
Steady state
What is the purpose of physiological buffers in homeostasis?
To reduce fluctuations in pH
What is an example of an animal that conforms to its environment?
Spider crab
What is the difference between a set point and a normal range in homeostasis?
A set point is a specific value, while a normal range is a range of values
What is the primary function of adaptations that reduce fluctuations in homeostasis?
To reduce fluctuations in the internal environment
What is the type of feedback involved in homeostasis?
Negative feedback
What is the main concept referred to as the maintenance of internal balance in animals?
Homeostasis
Learn how animals manage their internal environment in response to environmental fluctuations. Discover the difference between regulating and conforming, and how it helps maintain homeostasis.
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