Download Pancreas

Essential Question
How do the body systems work
together in a functional human
organism?
Standard
B.10A - describe the interactions that occur among systems
that perform the functions of regulation, nutrient
absorption, reproduction, and defense from injury or illness
in animals
Collect Today
Body Systems Slideshow
Assigned
Plant Systems Test Analysis (TOMORROW)
Protist/Fungi MAKEUP Quiz (TOMORROW)
Page 122 – Notecard Defintions (Tuesday – after SB)
Plant Systems Vocabulary MAKEUP Quiz (Thursday – after SB)
Plant Systems Essay MAKEUP (Thursday-after SB)
Late
Page 118 – Photosynthesis/Cellular Respiration Foldable (-50%)
Page 119 – Photosynthesis/Cellular Respiration Coloring (-50%)
Page 121 - Plant Systems Test Review (-50%)
Unit 10 – Body Systems
Definitions Due Tuesday (3/22/16)
All Parts Due Monday(3/28/16)
1. Digestion
2. Absorption
3. Respiration
4. Antibody
5. Stimuli
6. Response
7. Interdependence
8. Pathogen
9. Gamete
10. Hydrolysis
11. Circulatory System
12. Digestive System
13. Endocrine system
14. Epidermis
15. Excretion
16. Excretory System
17. Integumentary System
18. Muscular System
19. Nervous System
20. Pancreas
21. Reproductive System
22. Ovary
PG 122
23. Respiratory System
24. Skeletal System
25. Lymphatic System
26. Immune System
27. Organ
28. Neuron
Talk to your table group:
What are some things that your body
regulates?
(regulate = control)
What is homeostasis?
…its all about BALANCE
What does it mean?
Homeostasis comes
from the Greek and
means “staying the
same”
Maintaining a
constant internal
environment.
Claude Bernard
(1813-1878)
What happens when there is an imbalance in the
internal environment?
Jog on the spot for 60
seconds.
Start Timer
60 Seconds
60
45
30
15
0
How’s your
breathing?
Are you getting
warmer?
Start Timer
60 Seconds
60
45
30
15
0
FEEDBACK LOOP: how the body
maintains homeostasis when
something goes wrong
Negative
feedback
A decrease in function in response to a
stimulus. (Removes the stimulus)
The OPPOSITE thing is added to return to the
original condition
examples: shivering when you’re cold, blood
sugar regulation
Positive
feedback
An increase in function in response to a
stimulus. (adds the stimulus)
The SAME thing is added to return to the original
condition
examples: contractions before child birth, blood
clotting
Is this a positive or negative feedback
loop?
Increase
Body takes
action
Normal
Normal
Decrease
Decrease
Body takes
action
Increase
Why do we need to maintain a
constant temperature?
Enzymes work best at normal
o
body temperature (approx. 37 C)
Too hot and we can get
o
hyperthermia (40 C).
Too cold and we can get
hypothermia (35oC).
Too hot
Normal
Too cold
Too hot
Taking off some
clothes
Skin goes red
Sweating
Normal
Stamp feet
Too cold
Goosebumps
Shivering
Task.
Define homeostasis.
Define negative feedback?
Start Timer
5 Minutes
5
4
Evaluate and describe the
effect of the exercise on
your body – what did it do
to return to normal.
3
2
1
0
Food for the cells…
Glucose.
Cells need a healthy diet of
glucose.
Not too much…not too little
Body needs to control level of
sugar (glucose) in the blood.
This is done by the pancreas.
Too much glucose…
Pancreas secretes
a hormone called
insulin.
Insulin tells liver
to store the
glucose as
glycogen.
Not enough glucose…
Pancreas can also
secrete a
hormone called
glucagon.
This tells the
liver to convert
glycogen back to
glucose.
Normal blood
glucose levels
Pancreas
Blood
Liver
Blood
Liver
Normal blood
glucose levels
Pancreas
Pancreas
Blood
Liver
Makes
insulin.
Transports
insulin around
the body.
Converts
glucose to
glycogen and
stores it.
Pancreas
Blood
Liver
Makes
glucagon.
Transports
glucagon around
the body.
Converts glycogen
back into glucose
and puts it back
into the blood
Normal blood
glucose levels
Diabetes.
With diabetes (type I) the
pancreas does produce insulin.
It used to be called the
wasting disease as you died
very slowly, becoming weaker
and weaker, until you entered
a coma.
Diabetes.
Fortunately it is now treatable
and diabetics can lead virtually
normal lives by taking regular
injections of insulin.
This was thanks to the
pioneering work of
Banting and Best.
Diabetes video
Task.
In your own words, explain
how blood sugar level is
controlled by the pancreas
and the cause of diabetes.
Words to help:
hormone, insulin, glucose,
glycogen, liver, glucagon.
Insulin and the control of
blood sugar levels.
After a meal blood ……….. levels increase. As a result the
pancreas releases ……………. This enables the cells to absorb
………….., required for respiration, and also causes the ……….
to convert excess glucose to insoluble …………… for storage.
When blood sugar levels run low the ……………… releases
glucagon instead. This causes the ………….. to breakdown
the glycogen back into …………….. to give the cells energy. A
person with ……………. does not produce the insulin required
for absorbing and storing the glucose. As a result the person
feels tired, is constantly thirsty, urinates a lot and their body
slowly wastes away. Diabetes is treatable through injections
of ………………...
Insulin and the control of blood sugar levels.
sugar
glucose
liver
diabetes
insulin
pancreas
glycogen
After a meal blood sugar levels increase. As a result the pancreas releases
insulin. This enables the cells to absorb glucose, required for respiration, and
also causes the liver to convert excess glucose to insoluble glycogen for
storage. When blood sugar levels run low the pancreas releases glucagon
instead. This causes the liver to breakdown the glycogen back into glucose to
give the cells energy. A person with diabetes does not produce the insulin
required for absorbing and storing the glucose. As a result the person feels
tired, is constantly thirsty, urinates a lot and their body slowly wastes away.
Diabetes is treatable through injections of insulin.
Positive or negative?
Blood glucose regulation
Temperature regulation
For the rest of today…
1. Draw a feedback loop of
your own!
2. Think about how your
body responds when:
•
•
•
•
you get dehydrated
you get scared
you cut your finger
you get tired
3. Use your own example
for extra credit.
• You MUST get approval
before you begin.
• Requirements:
1.
2.
3.
4.
Your feedback loop must be
titled
You must have at least 4
steps in your loop
You must write the steps
and draw them (they
should be colored, too!)
These will go up in the
hallway…so make them
school appropriate and
neat!
• This is for a daily grade.