glucose concentration Flashcards
where is insulin produced?
pancreas
what does insulin and glycogen control?
glucose levels
—> it’s a form of homeostasis
what foods give you more glucose?
carbohydrates
(so glucose increases after eating)
the insulin response is an example of…
negative feedback
definition of homeostasis
maintaining a constant internal environment
why is glucose so important for our body?
it is a reactant for respiration
—> source of energy
when might glucose reduce significantly, and why?
- during intense/prolonged exercise
because more respiration has occurred
why do we need energy from glucose?
essential life processes
eg muscle contraction, maintaining a constant temperature, cell division and growth, active transport and protein synthesis
what is released when levels of glucose fall too low?
glucagon
where is glucagon released from?
pancreas
where does glucagon bind to?
receptors on the target cells
(especially those in the liver)
what is made when the glucose levels in the body are too high?
insulin
how does insulin reduce glucose concentrations in the blood?
Pancreas makes insulin after detecting blood glucose increase.
Insulin acts in the liver to reduce blood glucose concentration by:
–> increasing glucose absorption from the blood by the liver and muscles;
–> converting excess glucose to
glycogen which is stored mainly in the liver but also muscle;
–> increasing respiration in the liver
(bbc bitesize)
what is negative feedback?
the rise in the hormone (insulin in this example) leads to a drop in something else (eg glucose)
what is the disease called where your body does not do this process correctly?
diabetes
