Name________________________________________________________________ Period_________
Diabetes and Homeostasis
Analyzing National Data
Graph the data provided in the space provided. Be sure to label your axes and provide a key.
Название диаграммы
40
35
30
25
20
15
10
5
0
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
Percentage of persons diagnosed
Year
percentage of population classified as obese.
PREVALENCE OF DIABETES
Percentage of persons diagnosed
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
4.4
4.4
4.4
4.7
5.2
5.6
6.0
6.3
6.6
7.0
6.9
7.3
7.4
7.6
7.9
8.0
8.3
8.9
2012
2013
8.9
9.0
Year
1994
1997
1999
2000
2001
2002
2003
2004
2005
2007
2009
2013
Series 3
POPULATION TREND IN OBESITY
Percent of population classified as
obese*
20.5
23.9
27.7
28.0
28.3
29.1
31.7
32.0
33.8
34.5
35.9
37.7
Analysis Questions
1. What similarities exist between the two graphs? What correlation is indicated by this
similarity?
They each are steadily increasing except for maybe one of two years.
2. What is an additional reason (other than obesity) that there may be a rise in the number of
patients with diabetes?
It might be the genetics. Hereditary.. Also diet.
Normal Glucose Levels
Watch the videos below to answer the following questions about blood glucose regulation.
https://www.youtube.com/watch?v=y9Bdi4dnSlg&t=28s
https://www.youtube.com/watch?v=8dgoeYPoE-0
1. Among glucose (G), insulin (I), and glucagon (C), identify which molecule is being described.
a. ___I___ Hormone that causes the blood sugar level to decrease
b. ____C__ Hormone that causes the blood sugar level to increase
c. ___G___ Is the molecule measured in “blood-sugar” levels
d. ____I__ Promotes movement of glucose into certain cells
e. ____I__ Stimulates cells to break down glycogen into glucose
f.
____C__ Stimulates the formation of glycogen from glucose
2. What is the set point (normal level) for blood glucose?
5 MMOL
3. What organ detects above or below normal blood glucose concentrations?
PANCREAS
4. If blood glucose levels are too high, what hormone will this organ secrete?
INSULIN
5. If blood glucose levels are too low, what hormone will this organ secrete?
GLUCAGON
6. How does insulin cause the blood glucose level to decrease?
TAKE U GLUCOSE FROM THE BLOOD THROUGH THE GLUT4 TRANSPORTER
7. How does glucagon cause the blood glucose level to decrease?
INSTRUCTS THE LIVER TO CONVERT THE GLYCOGEN BACK TO GLUCOSE.
Flow Chart
In the flow chart, write the number of the event that would best illustrate the feedback loop that regulates blood
glucose levels.
1. Blood glucose levels decrease.
2. Glucagon breaks down glycogen from the liver.
3. Glucose is released into the blood stream.
4. Insulin triggers the absorption of glucose into the cells of the body.
5. Pancreas secretes glucagon.
6. Pancreas secretes insulin.
6
1
3
Too high…
Balanced Blood
Glucose Level
Too low…
4
2
5
Analysis Questions
1.
People who have Type 1 Diabetes do not make enough insulin. What effect would this have on their blood
glucose level?
The level would be too low.
2.
If their blood glucose level is too high, what two actions could people with diabetes take to maintain
homeostasis?
Check for Understanding
Several points on the graph below are labeled. Match the labels with the correct description below.
1
2
3
Match the numbered arrows
1. __1__ Person eats
2. __2__ Person begins exercise
3. __3__ Person stops exercise
Match the letters
4. __B__ Insulin released into the bloodstream
5. __D__ Glucagon released into the bloodstream
6. __A__ Blood glucose is increasing while food is being digested
7. __C__Blood glucose is decreasing because cells of the body are using it for energy