Topic Glucose Regulation Aim How does your body regulate glucose level in the blood stream Quick Review lets see if you remember Why is glucose important ID: 599014
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Unit 3: HomeostasisTopic: Glucose Regulation
Aim: How does your body regulate glucose level in the blood stream?Quick Review: (let’s see if you remember)Why is glucose important? _________________________________________________________________________________________________________Slide2
Controlling Glucose levels
Your cells also need an exact level of glucose in the blood. Glucose moves into the cells for cellular respirationExcess glucose gets turned into glycogen in the liverThis is regulated by 2 hormones (chemicals) from the pancreas called:
Insulin
GlucagonSlide3
If there is too much glucose in the blood, Insulin converts some of it to glycogen the rest moves into the cells for use in cellular respiration.
Glycogen
Insulin
Too much Glucose
in the blood
What happens if you have too much glucose in the blood due to a big meal you just had a few hours ago?Slide4
If there is not enough glucose in the blood, Glucagon converts some glycogen into glucose
.
Glycogen
Glucagon
Too little Glucose
in the blood
What happens if you have too little glucose in the blood because you haven’t been eating for the last 8-10 hours?Slide5
Diabetes: What causes diabetes?
Some people do not produce enough insulin.
When they eat food, the glucose levels in their blood cannot be reduced.
This condition is known as DIABETES.
Diabetics sometimes have to inject insulin into their blood. They have to be careful of their diet.Slide6
Time
Glucose
Concentration
Meal eaten
Insulin is produced and glucose levels fall to normal again.
Glucose levels rise after a meal.
Normal
1
hr
2
hr
3
hr
4
hr
5 hr 6 hr 7hr 8 hrGlucose level in non-diabetic peopleSlide7
Time
Glucose
Concentration
Meal eaten
Insulin is not produced so glucose levels stay high
Glucose levels rise after a meal.
Diabetic
1
hr
2
hr
3
hr
4
hr
5 hr 6 hr 7hr 8 hrGlucose level in diabetic peopleSlide8
The glucose in the blood increases.
Glycogen
Insulin
Glucose in the blood
But
there
is no insulin to convert it into glycogen
.
Glucose concentration rises to dangerous levels.
What would happen if your body does not produce enough insulin?Slide9
Pancreas produces Insulin
Glucose into cells
Out of blood
Blood glucose increases Homeostasis Blood glucose decreases
( High ) (Low)
Glucose out of cells
Into blood
Pancreas produces Glucagon
Blood Glucose Feedback Mechanism Slide10
Feedback: Maintaining Homeostasis
Balancing glucose levels in blood
pancreas
pancreas
insulin
liver
takes up
glucose
for storagecellstake upglucose
from bloodliver releasesglucose to blood
depress appetitestimulatehunger
glucagonSlide11
Regents Questions
During a race, the body temperature of a runner increases. The runner responds by perspiring, which lowers body temperature. This process is an example of1. maintenance of homeostasis 2. an antigen-antibody reaction3. an acquired characteristic 4. environmental factors affecting phenotype Slide12
Check for Understanding
Which two hormones work together to regulate glucose level in your blood? _______________ and _______________Which hormone is released when too much glucose is in your blood? ____________Which hormone is released when too little glucose is in your blood?____________What happens to glucose level in your blood if your body doesn’t produce enough insulin? __________________
________________________________________________________________________________Slide13
Check for Understanding
Why is it important to regulate the glucose blood level? _______________________________________________________________________________________________________________________________________________________________________________________________________________________