Bio Ch40 Pretest

25 July 2022
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question
Which is a correct statement about an organism and its environment?
answer
Interstitial fluid is the go-between for body cells and the circulatory system. ( Material from this fluid is exchanged with blood in capillaries.)
question
The four major categories of tissues are _____.
answer
nervous, epithelial, connective, and muscle
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Metabolic rate is _____.
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the total amount of energy an animal uses in a unit of time ( There are many variations of the measurement, such as basal metabolic rate and standard metabolic rate.)
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Which of the following are listed in the correct order based upon an increasing basal metabolic rate (BMR)?
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fish, dog, mouse ( Fish are ectotherms, typically having lower metabolic rates than mammals and birds.)
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Homeostasis is the _____.
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maintenance of a relatively constant internal environment ( Homeostasis is a dynamic state, maintained at great expense to the organism.)
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Negative feedback is a method of homeostatic control that _____.
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ensures that conditions in an organism do not vary too much above or below their set points
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In a system regulated by positive feedback, _____.
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a change in a variable will amplify rather than reverse the change
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Which of the following primarily involves heat transfer by convection?
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You roll down the car window to allow the cool breeze to blow through. ( Convection is the transfer of heat by the movement of air or a liquid past the surface of a body.)
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A countercurrent heat exchanger enables an animal to _____.
answer
reduce the loss of heat to the environment
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An energy-saving adaptation that conserves life during times of environmental stress or famine is _____.
answer
slowing respiration and circulation as well as decreasing body temperature and metabolism