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OXYGEN DEMAND (normal blood oxygen levels), cellular respiration: Glucose…
OXYGEN DEMAND (normal blood oxygen levels)
HYPOXIA (low oxygen levels)
external stimulus: excess exercise, altitude, confined spaces
low blood carrying oxygen can be due to:
decreased amount of haemoglobin
decreased availability of oxygen
decreased red blood cell count
kidneys respond by releasing erythropoietin (a hormone produced by the kidneys, stimulate bone marrow to produce red blood cells)
Red blood cell count is increased
Oxygen carrying ability of blood increases
Oxygen blood levels return to normal (restoring homeostatic balance)
red blood cells carry oxygen using a special protein haemoglobin which binds with oxygen
heart rate increases
more oxygenated blood is delivered to tissues through pumping heart
vital organs are prioritised
diaphragm contracts faster and more forcefully
breathing rate increases --> more oxygen enters the bloodstream
GAS TRANSPORT
Haemoglobin (Hb)
respiratory pigment in red blood cells(RBC): binds oxygen to the RBC
transports and delivers to tissues throughout the body
lung
bronchiole
alveoli
lung capillary
High oxygen levels
diaphragm contracts regularly and moderately
oxygen levels are stable and are being delivered to tissues efficiently
heart rate normal/ decreased
steady and moderate, body's oxygen is being met
cellular respiration: Glucose +
Oxygen
-->
Carbon Dioxide
+ Water + ATP + (heat)
Harriet Bodle