2.3 - metabolic rate

Cards (14)

  • define metabolic rate?
    the quantity of energy consumed per unit of time
  • how can metabolic rate be calculated?
    • oxygen consumption per minute
    • carbon dioxide produced per minute
    • heat produced per minute
  • What types of apparatus can be used to measure metabolic rate?
    • respirometer
    • oxygen probe
    • carbon dioxide probe
    • calorimeter
  • why is using a respirometer an indirect measurement of oxygen consumption?
    • oxygen inhaled but carbon dioxide not given out as absorbed by chemical in test tube
    • volume of gas in container is lower drawing more air/liquid up tube
  • general units for metabolic rate?
    ml/min/kg
  • how does a calorimeter measure metabolic rate?
    measures the change in temperature
  • an increased metabolism requires an increased need for oxygen for respiration
  • define complete circulatory system?
    2 atria and 2 ventricles
    oxygenated and deoxygenated blood do not mix within the heart
  • what does an incomplete circulatory system consist of?
    2 atria and 1 ventricle
    oxygenated and deoxygenated blood mixes
  • complete circulatory systems are more efficient than incomplete circulatory systems
  • Describe the circulatory system in mammals and birds?
    double complete circulatory system
    2 atria , 2 ventricles
    no mixing of blood
  • describe the circulatory system in amphibians and reptiles?
    double incomplete circulatory system
    2 atria , 1 ventricle
    mixing of blood
  • describe the circulatory system in fish?
    single incomplete circulatory system
    1 atrium , 1 ventricle
    blood flows in a single circuit
  • 3 abiotic factors that affect the ability of an organism to maintain its metabolic rate?
    • temperature
    • pH
    • salinity