Physiology of Respiration Quiz
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Questions and Answers

What is the primary factor that may increase Basal Metabolic Rate (BMR)?

  • Diffusion
  • Decrease
  • Perfusion
  • Environmental temperatures (correct)
  • Which activity contributes to Basal Metabolism?

  • Diffusion
  • Maintaining body temperature (correct)
  • Exercise
  • Vasoconstriction
  • What happens when daily energy intake is less than total daily energy expenditure?

  • Perfusion increases
  • Vasoconstriction occurs
  • Weight increases (correct)
  • Basal Metabolic Rate decreases
  • Which factor is NOT associated with an increase in Basal Metabolic Rate?

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

    What is the primary determinant of weight stability in relation to energy balance?

    <p>Total daily energy expenditure equaling daily energy intake</p> Signup and view all the answers

    What effect does an increase in metabolic rate have on respiratory rate?

    <p>It increases the respiratory rate to supply more oxygen to the cells.</p> Signup and view all the answers

    What is the primary site of heat loss in the body?

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

    How does a decrease in basal metabolic rate affect the respiratory rate?

    <p>It decreases the respiratory rate due to reduced oxygen demand.</p> Signup and view all the answers

    Which process involves the diffusion or dissemination of heat by electromagnetic waves?

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

    What effect does vasoconstriction have on perfusion?

    <p>It decreases perfusion by constricting blood vessels and reducing blood flow.</p> Signup and view all the answers

    What is the transfer of heat to another object during direct contact known as?

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

    What environmental or pathophysiologic alteration could result in an increase in respiratory rate?

    <p>Acid-base imbalance</p> Signup and view all the answers

    What is the term for the process of liquid turning into vapor as a means of heat loss?

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

    How does an increase in respiratory rate affect the exchange of gases in the lungs?

    <p>It decreases the exchange of gases due to reduced time for diffusion.</p> Signup and view all the answers

    In response to core body temperature and environmental temperature, what controls the opening and closing of arterio-venous shunts located below the skin surface?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    What is the primary source of heat production?

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

    Which hormone is a primary source of heat produced by various mechanisms?

    <p>Epinephrine / norepinephrine</p> Signup and view all the answers

    What is the function of contraction of pilomotor muscles?

    <p>Decreasing surface area of skin available for heat loss</p> Signup and view all the answers

    What is the role of vasodilation in body temperature regulation?

    <p>Increasing heat loss</p> Signup and view all the answers

    What term describes the process of decreasing the radius of arterioles?

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

    What is the term for the volume of blood ejected by the left ventricle in one contraction?

    <p>Cardiac output</p> Signup and view all the answers

    In the context of blood pressure, what does systolic pressure represent?

    <p>Force of moving blood against the arterial walls when the ventricles contract</p> Signup and view all the answers

    What is the term used to describe difficulty breathing with shallow, rapid respirations?

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

    What is the term for the long-term regulation of blood pressure by regulating extracellular volume through the kidneys?

    <p>Renin-angiotensin-aldosterone system</p> Signup and view all the answers

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