We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
You are on page 1/ 3
Biology Name:
Period:
David Blah
jomeostasis or Magic Inquiry
ln 2008, David Blaine attempted to break the world record for breath holding using a technique known
as oxygen assisted static apnea. Blaine appeared on the Oprah Winfrey show with a support team,
including a doctor that monitors his health during the stunt.
Atthe end of this inquiry, you will create a final model of the levels of biological organization impacted
by the breath hold. You will need to describe the mechanisms of homeostasis occuring at the cellular
level, the tissue level, the organ level, the organ system level, and at the entire organism level.
Part One - The Stunt
‘As you watch the video, take notes on the following question: What parts of David Blaine's body are
‘impacted during this stunt? You may reference parts of the
body using the diagram provided.
Video Notes
In the space below, make a prediction: How did David Blaine manage to hold his breath for so long? Part Two - Feedback Loops
Feedback loops are initiated by a stimulus, or change in a system, and lead to a response. Feedback
loops can be positive or negative. In positive feedback loops, a change leads to an amplification of the
stimulus. In negative feedback loops, a change leads to a decrease in the stimulus,
Determine which side of the image, above, represents negative feedback and which side represents
positive feedback. Label the image. In the space below, explain how the image represents a feedback
loop.
Complete each of the following scenarios with the mis
Feedback Loop: Blood Clotting
Stimulus:
Response:
Positive or negative:
Does this feedback loop maintain or disrupt homeostasis? Explain.
Soames Feedback Loop: Blood Sugar
Cae
Stimulus: EP i
cb Storing the sugar in
Response: a Diogo
bach to homeostasis
Positive or negative: stood supe Ng
bite Blood Sugar HomeaR Ie. Blood sugar
Does this feedback loop maintain or
disrupt homeostasis? Explain.
Feedback Loop: Blood Sugar (draw the loop In the empty space}
Stimulus: Low levels of suger in bloodstream
Response: Glucagon helps to release blood sugar in liver
Positive or negative:
Does this feedback loop maintain or disrupt homeostasis? Explain.
Feedback Loop: Fruit Ripening (draw the loop in the empty space}
Stimulus: Ripening fruit releases a chemical called ethylene
Response: Ethylene causes fruit ripening
Positive or negative:
Does this feedback loop maintain or disrupt homeostasis? Explain.
