Transcript Slide 1 - Brookwood High School

Circle of Life
Proteins
•
•
•
•
Organic polymers made from amino acids
Must be linked and folded in specific ways to function properly
Coded into our DNA
Enzymes, hormones, and antibodies
20 Amino Acids
• Nonessential (14)
• Essential (6)
–Body manufactures
–Must obtain from the food we eat
them naturally
–Kwashiorkor = “rejected one”
• Protein deficiency which often occurs in
children where protein is scarce
• Once child stops breastfeeding their
diet becomes high in fiber and
carbohydrates but lacking in protein.
This causes liver to become enlarged
and creates a swollen belly
Blood Sugar
amount of glucose in blood
job is to provide energy
• Bad carbohydrates
– Refined and processed
– Easy for body to break
down & absorb causing a
spike (sugar high)
• Good carbohydrates
– Difficult for body to break
down sugars
– Enters blood at a slower
rate and does not produce
sugar high
– Fruits, veggies, greens,
whole grains
Lipids
• Fats
• Used to store energy
• If there is too much sugar in the blood, the body will convert
sugar to fat and store it as triglycerides
Fats
• Unsaturated fats
– Come from plants
– Contain double bond
– Easier to break down
• Saturated fats
– Contains all single bonds
– Difficult to break down and
often stay in bloodstream
blocking arteries
• Anabolism
–Uses energy to
combine smaller
molecules to make
needed substances
–Growth hormone
–Insulin
–Testosterone
• Catabolism
–Break down of
molecules
–Usually to get energy
–Digesting your food
for example
Tomorrow’s Lab
• Calorimeter- is an insulated device used to measure the
amount of heat absorbed or released during a chemical
process
• Law of Conservation of Energy = energy (heat)
can not be created nor destroyed
Heat lost = heat gained
Q metal = Q water
C x m x ΔT = C x m x ΔT
Specific Heat Practice I
• Determine the specific heat of the metal:
– Mass of the metal =
– Initial temp of metal =
– Mass of water=
– Initial temp or water =
– Temp of water after metal =
183 g
100°C
100 g
9°C
28°C
Q lost = Q gained
Q metal = Q water
C m ΔT = C m ΔT
C (183) (28-100) = 4.184 (100) (28-9)
C (183) (-72) = 4.184 (100)(19)
C (13176) = 7949.6
C = 0.603