Homeostasis Shivering, Sweating,

1
HomeostasisShivering, Sweating, Hibernation

• Reacting to a Changing Environment

2.5
2
Todays Objectives

• Homeostasis notes
• IGNITE! Learning- Unit 10 Topics 78
• Complete the corresponding handout
• Sweating- video clip
• Homeostasis notes
• Homeostasis written assignment
• Homeostasis Computer Lab Project

3
Homeostasis- External Stimuli
Notes
Questions Vocabulary words Formulas Main
Ideas Possible Test Questions Key Concepts
Notes
Notes
Notes
Notes
Notes
Notes
Notes
Notes
Notes
Summary of the notes and information learned
4
Homeostasis- External Stimuli

• All living creatures do best within a certain
  range of factors
• Homeostasis (internal balance) can be affected by
  things inside the body- remember fever and
  vomit???
• But homeostasis can also be affected by things
  outside the body heat, cold, lack of food/water,
  amount of sunlight, etc.

5
Homeostasis- External Stimuli

• Shivering
• What happens to you when you get too cold?
• Why do you think this occurs?
• Shivering causes muscles to contract/work.
  Working muscles release heat which helps to
  maintain a stable body temperature- approximately
  98.6o F
• Shivering also fluffs up your fur helping to
  trap heat and further insulate the body.

6
Homeostasis- External Stimuli

• Sweating
• What happens to you when you get too hot?
• Why do you think this occurs?
• Blood rushes to the skin surface to dissipate
  heat from inside the body (you turn red or get
  flushed).
• Sweat is excreted onto the skins surface.
  Evaporation of the sweat cools the body and
  lowers your temperature to a more normal level.

7
Homeostasis- External Stimuli

• Sweating
• What about creatures who cannot sweat (like
  dogs)?
• What about cold-blooded creatures? How do they
  deal w/hot and cold temperatures?
• Human skin- sweating video clip

8
Homeostasis- External Stimuli

• Sleep
• Some creatures have evolved adaptations to their
  environment that involve different type of sleep
• Torpor- deep sleep
• Estivation- sleeping through heat
• Hibernation- sleeping through cold

9
Homeostasis- External Stimuli

• Sleep
• Torpor- deep sleep
• During torpor an animals body temperature drops,
  and its heartbeat slows
• This is a very deep sleep, but it may only last
  for minutes or hours. This is NOT hibernation.
• Many smaller animals go into torpor to preserve
  their energy- bats during the day, hummingbirds
  at night
• Torpor is a dangerous state for these animals

10
Homeostasis- External Stimuli

• Sleep
• Estivation- sleeping through heat
• Animals who live in hot, dry climates may
  estivate to protect themselves from the heat and
  lack of water/food
• Estivating animals do not eat, move or grow while
  asleep
• Their body temperature, heart rate, and
  metabolism drop
• Most estivate underground to hide from predators
  and heat
• Examples bees, frogs, snails, lizards, some
  turtles

11
Homeostasis- External Stimuli

• Sleep
• Hibernation- sleeping through cold
• Not like our sleep animals appear almost dead
  they cannot quickly wake-up, protect themselves,
  or even move/walk
• Animals prepare for hibernation by packing on
  extra body fat in the fall they live off that
  fat throughout their hibernation period
• Examples skunks, opossums, badgers, bears

12
IGNITE! Learning

• Unit 10 Topics 78
• Organisms and External Stimuli
• Involuntary Responses to External Stimuli
• Complete the corresponding handout

13
Homeostasis- External Stimuli
Notes
Questions Write two questions you still have
about homeostasis, hibernation, estivation,
etc. Two questions we didnt answer in the
lesson about our subject.
Notes
Notes
Notes
Notes
Notes
Notes
Notes
Notes
Notes
Summary of the notes and information learned
14
HomeostasisWritten Assignment

• Reacting to a Changing Environment

15
Keeping Warm / Keeping Cool

• Homeostasis Adaptation / Response Cards

16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
(No Transcript)
28
Homeostasis assessment computer-lab work

• Every student will be assigned one physical
  condition to research in the computer lab
• You will make a power point for your condition.
  You will need to make a slide for each of the
  following
• Name of the condition.
• What is (condition)?
• What causes (condition)?
• What are the symptoms of (condition)?
• What treatments are available for (condition)?
• How is (condition) prevented?
• List some statistics of (condition).
• Resources Cited

29
Conditions to Research

• Overeating
• Common Cold
• Cholera
• Ear infection
• Migraine
• Meningitis
• Flu
• Measles

• Tuberculosis
• Chicken Pox
• Appendicitis
• Rubella
• Mumps
• Brain Tumor
• Heat Stroke
• Dehydration

• Food Allergy
• Food Poisoning
• Motion sickness
• Dengue Fever
• Strep Throat
• Mononucleosis
• Balance disorders

30
Make it a great day Mustangs!