Transcript Essential Nutrients and The Tube (aka

SunSupperSweat
Convey in 20 words or less, how
solar energy transfers to
food energy and then to cellular
energy (ATP) which is used to do
the work of the body.
Photosynthetic magic transfer solar to food energy
Tasty meal
Cell respiration transfers food energy to cell fuel.
Voila, push ups
How Food Becomes You
Consumption
Digestion
Absorption
Transport
Metabolism
FOOD CONSUMPTION
THE FUN PART
What factors
influence your food
choices?
Digestion
What do you think? T/F
There is acid in the stomach
that could burn your skin.
Swallowed gum stays in the
stomach about a week.
Food really can go down the wrong ‘tube’.
A healthy GI tract is clean (sterile).
Food is made into ATP in the GI tract.
Gastrointestinal Tract
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The Food Tube
 Runs
through the body
 Gatekeeper to the body
 Whole foodscomponent parts
to be absorbed into bloodstream
 Proteins ?
 Carbs ?
 Fats/Oils ?
 Vitamins, minerals, water absorbed ~as is
Digestive Processes of GI Tract
Mechanical
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Chewing
Peristalsis
Chemical
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Acids
Bases
Water
Enzymes
Relevant terms
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Reverse peristalsis
Emulsification
Denaturation
Hydrolysis
A delish practical application of a few of these terms
In ‘N Out
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~ 30’ of muscular tube,
nerves, secretory organs
Mouth
Esophagus
Stomach
Small Intestine (SI)
Large Intestine (LI)
Rectum/Anus
How long is this ‘trip’?
In ‘N Out
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~ 30‘of muscular tube,
nerves, secretory organs
Mouth
Esophagus
Stomach
Small Intestine (helpers)
Large Intestine (LI)
Rectum/Anus
How long does this take?
Digestive Brew Dumps into SI
 Liver makes bile to emulsify fat
 Gall Bladder 
concentrates/stores/secretes bile
 Pancreas  makes/secretes digestive nz
 SI makes digestive nz for digestion
Large Intestine (LI)
Water re-absorption
 Good bacteria make ~Vitamin K
aka ‘probiotics’
 Bad bacteria cause sickness
 What NOT absorbed… is waste excreted
Bacteria and Fiber (↑ fiber ↓ transit time)
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What are prebiotics?
Absorption
Digested nutrients move
thru wall of SI into bloodstream
 Carbs as glucose
 Protein as amino acids
 Fats/oils as chylomicrons (type of lipoprotein)
Heart pumps blood to ‘feed’ all cells
Fig. 3-10, p. 81
Nutrient Roadmap
Consume food
Digest
Absorb
Transport
What’s next?
Nutrient Roadmap
Consume food
Digest food
Absorb nutrients
Transport to cell
Cells metabolize nutrients…
make energy (ATP)
build ‘stuff’
store extra calories as fat!!
What do you think now? T/F
There is acid in the stomach
that could burn your skin.
Swallowed gum stays in the
stomach about a week.
Food really can go down the wrong ‘tube’.
A healthy GI tract is clean (sterile).
Food is made into ATP in the GI tract.
Summary…how food becomes you!
Digest…..breakdown whole food
Absorb….transfer nutrients into blood
Transport…. move nutrients to cells
Metabolize….cell use or store nutrients
Think before you eat…!
Optional slides
Fig. 3-11, p. 82
Fig. 3-13, p. 89
Rate of
Digestion
p. 85
Rate of
Digestion
p. 85
Major Organ Roles in Digestion
Mouth
Stomach
SI
LI
mechanical is primary
carb digestion begins
chemical is primary
protein digestion begins
#1 site of chem digest
most nutrients absorbed here
water reabsorbed into blood
Metabolism-what happens in cells
 NRG nutrients cell fuel (ATP)
 Nutrients perform specific jobs
 Excess energy nutrients convert to fat and
are stored ….!