Homeostasis And Body Temperature R Flashcards
(15 cards)
What exactly is homeostasis
The regulation of the internal conditions of a cell or organism in response to Internal and external exchanges
Why is homeostasis important
It keeps conditions constant for enzyme actions and cell functions
Homeostasis includes the control of _______
The control of blood glucose concentration body temperature and body and ion levels
The control systems in homeostasis may involve
Responses using nerves and chemical responses using hormones
What do all control systems include
Cells called receptors which detects stimuli
coordination centres such as the brain spinal cord and pancreas which receive and process information from the receptors
and the effectors which are muscles or glands which bring about responses that restore optimum levels
What body temperature should the human body be kept around
37 degrees Celsius
What does the optimum human body temperature help
The optimum human body temperature helps enzymes to work
What controls and monitors the body temperature
The thermal regulatory centre in the brain
The thermal regulatory centre in the brain has receptors that monitor the temperature of the
Blood flowing through the brain
The thermal regulatory centre in the brain receives informations which are impulses from
Temperature receptors in the skin
What could happen if body temperature is too high and what is it called when body temperature is too high
It is called hyper thermia when the body temperature is too high and blood vessels widen directing more blood to the surface of the skin
More sweat
produced from the sweat glands and evaporate
both these mechanisms called a transfer of energy from the skin to the environment
What exactly is it called when blood vessels widen directing more blood to the surface of the skin
Vasodilation
What is it called when body temperature is too low
Hypothermia
What happens when the body temperature is too low
Blood vessels narrow direction blood away from the surface of the skin
Sweating stops
skeletal muscles uncontrollably contract and relax quickly which is called shivering which transfers more heat to the blood
What is it called when it is too cold and blood vessels and marrow directing blood away from the surface of the skin
Vasoconstriction
