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2695081
Homeostasis - GCSE Biology
Descrição
GCSE Biology Mapa Mental sobre Homeostasis - GCSE Biology, criado por Beth Coiley em 10-05-2015.
Sem etiquetas
biology
homeostasis
thermoregulation
biology
gcse
Mapa Mental por
Beth Coiley
, atualizado more than 1 year ago
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Criado por
Beth Coiley
aproximadamente 9 anos atrás
22
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Resumo de Recurso
Homeostasis - GCSE Biology
Maintaining a constant internal environment
Conditions that must be controlled:
Core body temperature
Water content
Carbon dioxide level
Blood sugar level
Hormones are responsible for homeostasis
Proteins that act as chemical messengers
Secreted by glands
Transported in the bloodstream
Only affect the function of particular songs
Activated cells are called 'target' cells
Cells have a chemical receptor that responds to the hormone
Thermoregulation
Thermoregulatory centre in the hypothalamus senses the temperature of the blood flowing through it
Hypothalamus triggers responses to heat loss/gain
Hypothalamus reverts body temp. back towards the normal
This system is called negative feedback
Water content regulation
Controlled by loss of ions from:
The lungs through exhalation
The skin through sweating
Urination - the kidneys
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