7.4.1 Thermoregulation

    Cards (52)

    • What is the definition of thermoregulation?
      Maintain body temperature
    • Humans maintain a body temperature around 37°C despite external temperature changes.
    • Thermoregulation maintains a stable body temperature necessary for proper enzyme function
    • Order the aspects of thermoregulation by their importance.
      1️⃣ Enzyme Function
      2️⃣ Metabolic Processes
      3️⃣ Health
    • Which component of the thermoregulatory system serves as the body's thermostat?
      Hypothalamus
    • Sweat glands secrete sweat, which cools the body through evaporation
    • Match the components of the thermoregulatory system with their roles.
      Hypothalamus ↔️ Body's thermostat
      Skin ↔️ Regulates heat exchange
      Blood Vessels ↔️ Dilate or constrict
      Sweat Glands ↔️ Produce sweat for cooling
    • What are the primary processes that generate heat during exercise?
      Muscle contraction and metabolic rate
    • Increased body temperature during exercise can improve muscle elasticity but may lead to fatigue if not regulated.
    • Cooling through the evaporation of sweat is called evaporation
    • Which heat loss mechanism involves the emission of electromagnetic waves from the skin?
      Radiation
    • ATP is broken down during muscle contraction to power movement, releasing heat as a byproduct.
    • What happens to metabolic rate during exercise?
      It increases
    • Heat generated during exercise improves muscle elasticity and reaction speed.
    • Match the heat loss mechanism with its description:
      Radiation ↔️ Loss of heat through electromagnetic waves
      Convection ↔️ Transfer of heat through air or water movement
      Evaporation ↔️ Cooling through sweat evaporation
      Conduction ↔️ Heat transfer through direct contact
    • Evaporation cools the body by converting sweat from liquid to a gas.
    • What is the primary function of thermoregulation?
      Maintain body temperature
    • Enzymes function optimally at a body temperature of 37°C.
    • Thermoregulation prevents overheating and hypothermia to ensure proper enzyme function.
    • Match the thermoregulatory system component with its role:
      Hypothalamus ↔️ Body's thermostat
      Skin ↔️ Barrier to regulate heat exchange
      Blood Vessels ↔️ Dilate or constrict to control heat loss
      Sweat Glands ↔️ Secrete sweat for cooling
    • What are the two primary processes that produce heat during exercise?
      Muscle contraction and metabolic rate increase
    • Radiation involves the loss of heat through electromagnetic waves from the skin.
    • Evaporative cooling is most effective during intense exercise.
    • What is the central role of the hypothalamus in thermoregulation?
      Body's thermostat
    • The hormones thyroxine and adrenaline regulate metabolic rate and heat production.
    • What effect does thyroxine have on body temperature?
      Raises body temperature
    • Adrenaline increases metabolic rate during stress or exercise.
    • Negative feedback in thermoregulation ensures body temperature returns to a stable range.
    • Which component acts as the body's thermostat in feedback mechanisms?
      Hypothalamus
    • Order the events of negative feedback when body temperature rises during exercise:
      1️⃣ Hypothalamus monitors rising temperature
      2️⃣ Thermoreceptors detect temperature change
      3️⃣ Hypothalamus stimulates sweating
      4️⃣ Blood vessels dilate to release heat
    • Positive feedback in thermoregulation enhances blood clotting during injuries.
    • What physiological responses does the hypothalamus stimulate when body temperature rises due to exercise?
      Sweating and vasodilation
    • Coagulation factors, proteins in the blood, enhance blood clotting
    • In what physiological scenario is positive feedback used in thermoregulation?
      Blood clotting
    • Thermoregulation maintains body temperature within a narrow range to ensure enzymes function optimally.
    • Thermoregulation maintains a stable body temperature necessary for proper enzyme function
    • Match the aspect of thermoregulation with its importance:
      Enzyme Function ↔️ Peak efficiency
      Metabolic Processes ↔️ Efficient chemical reactions
      Health ↔️ Prevents overheating and hypothermia
    • Which component of the thermoregulatory system acts as the body's thermostat?
      Hypothalamus
    • The skin regulates heat exchange with the environment through hair follicles and adipose tissue.
    • Sweat glands secrete sweat, which cools the body through evaporation