Body Temperature, Energy and Heat Loss

    Body Temperature, Energy and Heat Loss
    Which of the following forms of heat therapy relies mainly on conduction?
    A hot water bottle will transfer heat to objects in contact with it. The other three rely on a form of radiation.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    What does “hypothermia” refer to?
    Hypothermia is a body temperature that is below the healthy range, that is, below 35 °C.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    In what situation will the ability to lose heat by evaporation of sweat be diminished?
    If the body is dehydrated, its ability to secrete sweat is diminished. The amount of bare skin does not affect sweating.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    What is the most effective way to deposit heat in bones and joints?
    Ultrasound is the most effective form of diathermy as bones absorb ultrasound more effectively than soft tissue.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    In which situation will the evaporation of sweat from the skin be ineffective as a heat loss method?
    Sweat will evaporate only if the surrounding air is not already saturated with water vapour. High humidity decreases the effectiveness of sweating as a heat loss mechanism.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    Which choice explains how the evaporation of sweat “cools” our body?
    Water molecules have a range of KE. The water molecules with the most KE are those that vaporise first. Sweat will be at the same temperature as the skin it sits on.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    Which one of the following statements does NOT accurately describe energy?
    Energy can be neither created nor destroyed.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    On a normal winter day, by what means does the human body lose most of its heat?
    Heat loss through radiation (of infrared radiation) occurs continuously despite being clothed. Heat loss by conduction is low as clothes are insulators and also decrease convection losses. Sweating will be low on a cool winter day so evaporation will not be a major heat loss avenue.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    Which of the following correctly states the principle of conservation of energy in terms of the human body? (Assume no foodstuffs are consumed and no urine or faeces are excreted.)
    Energy that leaves the body (without mass) must be in the form of heat loss or work done by body movements. The formula in A may be used to determine the energy value of a food burned in a calorimeter.
    Author: rikazzz Comment
    Body Temperature, Energy and Heat Loss
    The Système International (Standard International) unit of power is the watt. This unit is the same as which one of the following?
    Power is the rate of doing work or of converting energy from one form to another. The unit of power = J/s is renamed the watt in honour of James Watt. All the other choices are units of energy.
    Author: rikazzz Comment