AS91604
Homeostasis
Homeostasis
Enzymes which control metabolioc processes in the body can only operate efficiently within a narrow range of internal environmental conditions. It is therefore necessary for there to be control systems in place to make sure the internal environment is kept as stable as possible. Factors that must be controlled include temperature, water balance, glucose levels, pH. This control system is known as HOMEOSTASIS. This assessment will focus on how humans maintain water balance - known as Osmoregulation.
Enzymes which control metabolioc processes in the body can only operate efficiently within a narrow range of internal environmental conditions. It is therefore necessary for there to be control systems in place to make sure the internal environment is kept as stable as possible. Factors that must be controlled include temperature, water balance, glucose levels, pH. This control system is known as HOMEOSTASIS. This assessment will focus on how humans maintain water balance - known as Osmoregulation.
as91604.pdf
The Anterior Pituitary Gland
The Anterior Pituitary Gland
The Posterior Pituitary Gland
The Posterior Pituitary Gland
Secretes Antidiuretic Hormone(ADH) in response to high plasma osmolarity.
Water
Water
The 'universal solvent' which is essential for life.
It is needed as
a solvent for essential nutrients, gases, waste
to transport substances
for temperature control
for gas exchange
for hydrolysis reactions(metabolic reactions where water is one of the reactants)
Osmoregulation
Osmoregulation
Water is constantly lost from our bodies and must therefore be replaced.
Water is constantly lost from our bodies and must therefore be replaced.
It is lost as urine, sweat, in our faeces, or as water vapour(exhaled air).
It is lost as urine, sweat, in our faeces, or as water vapour(exhaled air).
It is replaced by drinking, eating and is also produced as a by-product of metabolic reactions occurring in our cells.
It is replaced by drinking, eating and is also produced as a by-product of metabolic reactions occurring in our cells.
Osmoregulation is the homeostatic process that controls the level of water within our cells.
Osmoregulation is the homeostatic process that controls the level of water within our cells.