Transcript Thermoregulation1

Announcements
• Turn in your “I am a _________ cell”
information with name on back side and
definition of “homeostasis.”
• Personal info (voluntary) due Friday
• Group pictures in lab this week
• Switch to Tuesday Morning Lab?
• Community of Scholars Research Symposium
– Saturday Sept 11 from 9- noon
– 10 weeks paid research on topic of your choosing!
– Summer 2011?
1QQ # 1
Name on top edge, back side of paper
Answer on blank side of paper.
Answer one of the following:
1.The 200+ cell types in the human
body can be classified into one of 4
cell types or tissue types. List 3 of
the 4 types.
2.List as many items that you can think
of that are measured and reported in
a CBC (complete blood count.)
3.Why are CBCs so important to
physicians and their patients?
A Taxonomy of Cognitive Skills for Developing Student Assignments and Assessments*
*SC SDE (Pat Mohr). Adapted from Lorin W. Anderson, David R. Krathwohl et al (Eds.) A Taxonomy for Learning, Teaching, and Assessing: A Revision
of Bloom’s Taxonomy of Educational Objectives  2001; modified by Ellen Goldey, Wofford College, to incorporate “Biology in Bloom,” Crowe et al.,
2008, CBE – Life Sci Edu., 7: 368-381.
**HOCS = higher order cognitive skills, LOCS = lower order cognitive skills.
Cognitive
Domain
(Revised
Bloom)
Description
Action verbs
Original
Bloom’s term
1.Remember
(LOCS)**
2. Understand
(LOCS)
3. Apply
(LOCS/HOCS)
4. Analyze
(HOCS)
5. Evaluate
(HOCS)
6. Create
(HOCS)
Retrieve
relevant
knowledge
Describe
meaning
Use/apply
procedures or
info in novel
context
Infer
relationships
between
components
or parts and
bigger picture
Make
judgments
based on
evidence,
criteria, and
standards
Piece together
info to form
novel whole;
create original
product
Recognize,
identify,
recall, list,
label
Interpret,
exemplify,
classify,
summarize/
explain/describe
in own words
Execute,
predict
Knowledge
Comprehension
Application
Differentiate,
Verify, critique,
organize, link,
assess merit
attribute, infer,
interpret,
diagnose,
compare/contra
st, conclude,
speculate
Generate, plan,
build, produce,
design, model
Analysis
Synthesis
Evaluation
The body: A society of
interdependent cells, each type with
its own needs and contributions.
The Human Body:
A Society of Cells
• Imagine you are a cell. Ask yourself:
• How did I get here?
• What do I do for myself? (What are my special characteristics and
functions?)
• What do I do for the person in whom I reside? (What are my
contributions to the whole organism? To homeostasis?)
• What do I need simply to survive?
• What do the other cells provide for me that I cannot obtain alone?
• What governs my actions?
• How long will I live?
• Can I be replaced? If so, how?
• What would happen to the organism if I along with all the other cells
of my type were to fail to function properly?
O2
pH
CO2
Temp,
[glucose],
[Na+],
[K+],
[Ca++],
amino acids
Nucleic acids
Cell Membrane: selectively permeable
Capillaries: highly permeable except to proteins
Homeostasis:
• The relative
constancy of
the internal
environment
• Steady state
vs. equilibrium
Beggar
Thessaloniki, Greece
Homeostasis:
• The relative
constancy of
the internal
environment
• Steady state
vs. equilibrium
Street vendor
Thessaloniki, Greece
Homeostasis:
• The relative
constancy of
the internal
environment
• Steady state
vs. equilibrium
San woman
Kalahari Desert, Botswana
Homeostasis:
Camp’s Bay Beach, Cape Town, South Africa
Homeostasis:
Phillip cooling off in waterfall, Vietnam
o
~37 C
Homeostasis
• Regulated via reflex arcs and naturally
maintained by the process of negative
feedback
• Measurement
– Which physiological variables?
– Averages and ranges
Diurnal cycles
Awake
Sleep
Awake
Fig. 01.08
Sleep
Major point: Set points are not absolute!
Thermoregulation
An example of homeostasis by
negative feedback.
The Challenge:
# 1: Melt these 7 ice cubes as fast as possible. How to do it?
# 2: Make these 7 ice cubes last as long as possible? How to do it?
These are non-living objects: heat exchanges with the environment but
they don’t generate heat from metabolism as living things do!
o
~37 C
•
•
•
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Conduction
Convection
Evaporation
Radiation
Metabolism generates heat.
Metabolism is variable!
In steady state: Heat gain = Heat loss
Modes of Heat Exchange:
Conduction
Convection
Radiation
Evaporation
~37oC
Modes of Heat Exchange:
Conduction
Convection
Radiation
Evaporation
~37oC
Modes of Heat Exchange:
Conduction
Convection
Radiation
Evaporation
~37oC
http://www.nws.noaa.gov/os/windchill/windchillglossary.shtml