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Pop Quiz scenario on feedback loops ...

BIOL 2010 Human Anatomy & Physiology I. Pop Quiz scenario on feedback loops . Refer to “Case Study” pg. 9. Discuss with a neighbor be ready to share with class… . How does chemistry relate to feedback loops and Human A&P ?.

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Pop Quiz scenario on feedback loops ...

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  1. BIOL 2010 Human Anatomy & Physiology I Pop Quiz scenario on feedback loops... Refer to “Case Study” pg. 9. Discuss with a neighbor be ready to share with class…

  2. How does chemistry relate to feedback loops and Human A&P? Before we answer that question, let’s explore what you already know (or don’t know) about chemistry! How did you do with Assg. 1?

  3. Now let’s focus our attention on more chemistry... FOOD!!! Let’s look at a specific variable in our bodies: We will refer to this variable as we discuss both feedback loops and chemistry as they pertain to eating PRETZELS.

  4. What’s in a pretzel? Let’s list the ingredients… Do pretzels have mass or weight? Do pretzels have energy?If so, what type(s)? Are pretzels comprised of atoms, moleculesor compounds? Let’s look at the periodic table

  5. Which of the ingredients we listed are “inorganic”? What would be classified as “organic”? Looking at our salt… Is it “held together” by covalentor ionic bonding? When we eat the pretzel and add water (from our saliva) what happens to the salt? Why?

  6. 131I and 127I what is the difference? • One is stable and one decays into a different element (half-life of 8 days).

  7. How are these two types of chemical bonds different? = atoms gain or lose electrons & stay associated by different charges. = atoms share electrons and stay associated based on attraction of other’s e-

  8. What inorganic compoundsare important to the human body?

  9. What is an acid? • What is a base? • Buffers?

  10. Chemical reactions and energy… • Synthesis vs decomposition • Speed of reactions

  11. What are the main groups oforganic compounds…? 1) 2) 3) 4) 5)

  12. What are the main groups oforganic compounds…? 1) • Comprised primarily of • “Like dissolves Like” • Different combinations:

  13. What are the main groups oforganic compounds…? ? 2) • Also carbon & “hydrate” but … • Consequently • “Like dissolves Like” • Different types: ~___% of fats in our bodies

  14. What are the main groups oforganic compounds…? 2) ? ? Looking at the different atoms combining to form the phospholipid, which region would you predict to be POLAR and which region NON-POLAR?

  15. What are the main groups oforganic compounds…? 3) • Also comprised of carbon & “hydrate”, but _________also an important component • Can have _________ and other elements • Different levels: Refer to pg. 47

  16. What is an enzyme again? • Cofactors or coenzymes? • Examples…

  17. What are the main groups oforganic compounds…? 4) • Comprised of carbon & “hydrate” but also ________________and _______________ • Depending on sugar either… • 5 nitrogen bases:

  18. What are the main groups oforganic compounds…? 5) • Comprised of similar components as nucleic acids… • What’s different? • Important “currency” of ______ in the body • Which has more potential/chemical energy... ATP (adenosinetriphosphate) or ADP (adenosinediphosphate)?

  19. When we “dump” excess sodium (Na+) into the system how is homeostasis maintained??? What 3 components probably exist? 1) Receptor 2) Receiver (control center) 3) Effector

  20. Is this a positive or negative feedback loop? - +

  21. Discuss with your neighbor and predict an answer. Take 5! Is the sensation of thirst associated with a negative or a positive feedback mechanism? Why?

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