regulation in animals Flashcards
(11 cards)
high blood glucose –>
hardening of arteries –> poor circulation –> necroisis and associated inflammation
where is insulin produced?
beta cells
what is the stimulus for insulin production? (stimulus)
high blood glucose levels
what does insulin do? (effector)
glucose is stored as glycogen in liver and muscle cells
where is glucagon produced?
alpha cells
what is the stimulus for glucagon production? (stimulus)
low blood glucose levels
what does glucagon do? (effector)
glucagon in liver and muscle cells is broken down into glucose
how to test for high blood glucose/diabetes? (add)
- 10cm^3 of urine sample in test tube
- put 5 drops of Benedict’s solution into the test tube with urine sample
- place into hot water bath set at 100 degrees/ heat using bunsen and beaker
- heat for 3 minutes
- observe colour change
increasing body temperature thyroid effector
thyroid stops releasing thyroxine, leading to slower metabolism( process of converting food/drink into energy) so less heat production
water level in blood decreases
stimulus: decreased water level in blood
receptor: osmoreceptors in the hypothalamus
coordinator: hypothalamus stimulates pituitary gland to secrete ADH
effector: pituitary gland releases ADH, ADH acts on the convoluted tubule and collecting ducts leading to higher permeability to water, therefore more water is absorbed into the blood
response: increased water level in the blood
water level in blood increases
stimulus: increased water level in blood
receptor: osmoreceptors in the hypothalamus
coordinator: hypothalamus stimulates pituitary gland to stop secreting ADH
effector: pituitary gland stops releasing ADH, ADH acts on the convoluted tubule and collecting ducts leading to lower permeability to water, therefore less water is absorbed into the blood
response: decreased water level in the blood
