pop quiz scenario on feedback loops

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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 ?. - PowerPoint PPT Presentation

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Pop Quiz scenario on feedback loops...BIOL 2010 Human Anatomy & Physiology IRefer 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?Before we answer that question, lets explore what you already know (or dont know) about chemistry!

How did you do with Assg. 1?

Now lets focus our attention on more chemistry...FOOD!!!Lets 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.Do pretzels have mass or weight?Do pretzels have energy?If so, what type(s)?Are pretzels comprised of atoms, molecules or compounds?Lets look at the periodic tableWhats in a pretzel?

Lets list the ingredientsWhich of the ingredients we listed are inorganic?What would be classified as organic?Looking at our saltIs it held together by covalent or ionic bonding?When we eat the pretzel and add water (from our saliva) what happens to the salt?Why?

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

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 others e-

What inorganic compounds are important to the human body?

What is an acid?

What is a base?

Buffers?Chemical reactions and energy

Synthesis vs decomposition

Speed of reactions1) 2) 3) 4) 5) What are the main groups of organic compounds?1)

Comprised primarily of

Like dissolves Like Different combinations:

What are the main groups of organic compounds?2) Also carbon & hydrate but Consequently

Like dissolves Like Different types:

~___% of fats in our bodiesWhat are the main groups of organic 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?

??What are the main groups of organic compounds?3)

Also comprised of carbon & hydrate, but _________ also an important component Can have _________ and other elements Different levels:

Refer to pg. 47What are the main groups of organic compounds?What is an enzyme again?

Cofactors or coenzymes?

Examples4)

Comprised of carbon & hydrate but also ________________and _______________ Depending on sugar either

5 nitrogen bases: What are the main groups of organic compounds?5)

Comprised of similar components as nucleic acidsWhats different? Important currency of ______ in the body Which has more potential/chemical energy... ATP(adenosinetriphosphate) or ADP (adenosinediphosphate)?What are the main groups of organic compounds?When we dump excess sodium (Na+) into the system how is homeostasis maintained???What 3 components probably exist?1) Receptor2) Receiver (control center)3) Effector Is this a positive or negative feedback loop?+-Is the sensation of thirst associated with a negative or a positive feedback mechanism?Why?Take 5!

Discuss with your neighbor and predict an answer.

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