Insulin And Glucagon Flashcards
The control of blood sugar is a
Negative feedback loop
Blood sugar rising feedback loop
Stimulus: blood sugar rises
Sensor: pancreas
Control Centre: hypothalamus
Effector: insulin secretion
What happens when your blood sugar level is too high
Beta cells in the pancreas release insulin to the blood,
The liver and body cells take up the glucose and store it as glycogen the body cell use it for cellular respiration
What happens when your blood sugar level is too low?
Alpha cells in the pancreas release, glucagon, this glucagon is broken down into glucose by the liver
What is the optimal range for blood sugar level?
90 mg/100 mL
What would you expect to happen if someone’s blood glucose level was 120 mg/100 mL?
Their blood sugar levels would be too high and beta cells in the pancreas with insulin that insulin would go to the liver to be stored as glycogen, which would then be used by the body cells and the liver cells
What is the control of basal metabolic rate under?
The thyroid gland
What is the thyroid gland made up of?
Follicles, that contains smaller cells that store hormones called T3 and T4
Explain the negative feedback loop of decreased body temperature
- When the body is subjected to low temperature
- The hypothalamus is stimulated to produce TRH by the cold, cortisol or the nervous system
- then it goes to the anterior pituitary gland to release TSH, which causes the release of T3 and T4 at the thyroid. This increases cellular respiration rate, and increases temperature.
- The TSH goes into the bloodstream and only interacts with the thyroid, which then has T3 and T4 components. The effects are an increased BMR and increased glucose uptake.

What is the principle hormone secreted by the corpus luteum?
Progesterone
Cortisol produces a
Long-term slow response to stress by raising glucose levels. Suppressing immune response inhibiting inflammatory response.
what produces insulin and glucagon
islets of langerhans
