Physiological Regulation and Scaling Quiz
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Questions and Answers

Which of the following is NOT a variable that is part of the milieu intérieur?

  • Ions (Na+, K+, Cl-)
  • Time spent foraging (correct)
  • Blood glucose in mammals
  • Water osmolarity
  • Which of the following is a pro of regulation in physiological processes?

  • Cells experience constant conditions (correct)
  • Regulation is energetically cheap
  • Cells must have mechanisms to cope with variability
  • Regulation has limits
  • Which of the following is a con of conformity in physiological processes?

  • Conformity has limits
  • Cells must have mechanisms to cope with variability (correct)
  • Conformity is energetically cheap
  • Cells experience constant conditions
  • What is the definition of homeostasis?

    <p>The condition of a relatively stable internal physiological environment, usually involving extensive feedback mechanisms.</p> Signup and view all the answers

    Which of the following is an example of a sensor in homeostasis?

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

    What type of control mechanism is involved in homeostasis when the body is too hot?

    <p>On/off control</p> Signup and view all the answers

    What type of control mechanism is involved in homeostasis when the body is too cold?

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

    How is homeostasis achieved hormonally?

    <p>Insulin &amp; glucagon from pancreas regulate mammalian blood sugar</p> Signup and view all the answers

    How is homeostasis achieved neurally?

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

    How is homeostasis achieved biochemically?

    <p>Osmolarity of body fluids is regulated by the kidneys</p> Signup and view all the answers

    According to the text, what is the equation for direct proportionality (isometric scaling)?

    <p>$Y = aX^1$</p> Signup and view all the answers

    According to the text, what is the equation for non-linear proportionality (allometric scaling)?

    <p>$Y = aX^b$</p> Signup and view all the answers

    According to the text, what is the equation for calculating mammal basal metabolic rate (BMR)?

    <p>$BMR = 3.53M^{0.72}$</p> Signup and view all the answers

    According to the text, what is the equation for calculating heart mass in relation to body mass?

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

    According to the text, what is the equation for calculating heart rate in relation to body mass?

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

    According to the text, what is the equation for scaling growth rate with mass for plants?

    <p>$Growth\ rate = M^{0.75}$</p> Signup and view all the answers

    According to the text, what is the equation for scaling mammal basal metabolic rate (BMR) with body mass?

    <p>$BMR = M^{0.72}$</p> Signup and view all the answers

    According to the text, what is the equation for scaling VO2max with body mass?

    <p>$VO2max = M^{0.86}$</p> Signup and view all the answers

    According to the text, what is the equation for calculating the ratio of mammal basal metabolic rate (BMR) between placental mammals and marsupial mammals?

    <p>$\frac{BMR_{placental}}{BMR_{marsupial}} = 1.4$</p> Signup and view all the answers

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