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. (B)</p> Signup and view all the answers

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

<p>Water temperature (C)</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 (B)</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 (B)</p> Signup and view all the answers

How is homeostasis achieved hormonally?

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

How is homeostasis achieved neurally?

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

How is homeostasis achieved biochemically?

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

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

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

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

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

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

<p>$BMR = 3.53M^{0.72}$ (A)</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>$Heart\ mass = 0.0059M^{0.75}$ (B)</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>$Heart\ rate = 241M^{-0.25}$ (B)</p> Signup and view all the answers

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

<p>$Growth\ rate = M^{0.75}$ (B)</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>$BMR = M^{0.72}$ (B)</p> Signup and view all the answers

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

<p>$VO2max = M^{0.86}$ (C)</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>$\frac{BMR_{placental}}{BMR_{marsupial}} = 1.4$ (D)</p> Signup and view all the answers

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