Physiological Regulation and Scaling Quiz
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Questions and Answers

Which of the following is an example of positive feedback control system?

  • Maintaining rates of reactions by altering pathways and enzymes
  • Activating/repressing cell-signalling pathways that regulate gene expression
  • Fever homeostatic (correct)
  • Scaling – the study of how structural, mechanical, and physiological properties change with changing size

    • What is the equation for direct proportionality (isometric scaling) with a constant term?

  • $Y = aX^b$
  • $Y = aX^1 + C$ (correct)
  • $Y = aX^1$
  • $Y = aX^b + C$

    • What is the equation for allometric scaling?

  • $Y = aX^1$
  • $Y = aX^1 + C$
  • $Y = aX^b + C$
  • $Y = aX^b$ (correct)

    • What does a logarithmic transformation of non-linear data help with?

    <p>Linearizing the data</p> Signup and view all the answers

    Which variable is the independent variable in the study of scaling?

    <p>Log Body Mass (kg)</p> Signup and view all the answers

    What does residual analysis help determine in scaling studies?

    <p>Species above or below an allometric line</p> Signup and view all the answers

    What is the scaling exponent for mammal basal metabolic rate (BMR)?

    <p>0.75</p> Signup and view all the answers

    What is the scaling exponent for VO2max?

    <p>0.86</p> Signup and view all the answers

    What is the equation for heart mass scaling with body mass?

    <p>$0.0059M^{0.75}$</p> Signup and view all the answers

    What is the equation for heart rate scaling with body mass?

    <p>$241M^{-0.25}$</p> Signup and view all the answers

    Which of the following is a variable that is part of the internal environment of organisms?

    <p>Water temperature</p> Signup and view all the answers

    What is the definition of homeostasis?

    <p>The condition of a relatively stable internal physiological environment</p> Signup and view all the answers

    What is the function of a sensor in homeostasis?

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

    Which of the following is an example of negative feedback in homeostasis?

    <p>Decrease heat loss when too cold</p> Signup and view all the answers

    What type of control is used in homeostasis to regulate body temperature?

    <p>Proportional control</p> Signup and view all the answers

    Which of the following is an example of hormonal control in homeostasis?

    <p>Insulin and glucagon regulate blood sugar levels</p> Signup and view all the answers

    Which of the following is an example of neuronal control in homeostasis?

    <p>Vasoconstriction and vasodilation regulate heat loss</p> Signup and view all the answers

    What are the pros of regulation in physiological processes?

    <p>Cells experience constant conditions</p> Signup and view all the answers

    What are the cons of regulation in physiological processes?

    <p>Energetically costly</p> Signup and view all the answers

    What are the pros of conformity in physiological processes?

    <p>Energetically cheap</p> Signup and view all the answers

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