Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
show password

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how



Which nutrients provide us with energy? Carbohydrates, proteins, and fats
what are the initial breakdown products? Carbohydrates break down to monsaccharides Triglycerides break down to fatty acids Proteins breakdown to amino acids
Aerobic Cellular Respiration Stage 1: Acetyl CoA production separate metabolic pathways coverage acetyl CoA=2carbon unit, "activated acetate"
Aerobic Cellular Respiration Stage 2: Acetyl CoA oxidation citric acid cycle removes electrons and produces NADH and FADH2
Aerobic Cellular Respiration Stage 3: electron transfer and oxidative phosphorylation: electrons are transferred from NADH and FADH2, ultimately to O2. 90% of cellular ATP production.
USDA Recommended caloric distribution 50% Carbs 30% Fats 20% Proteins
Why do we need carbohydrates? 1. Glucose is the preferred energy source for brain D.R. is 160g 120g for brain 2. Glucose is quick energy source in other tissues 3. Glucose is required for nucleotide synthesis (ribose 5-P)
Why do we need carbohydrates? card 2 4. Glucose is required to synthesize structural polymers (extracellular matrix) 5. Glucose is conveniently stored as glycogen for later use
How does glucose enter the bloodstream? 1. Ingest food containing glucose, disaccharides, or polysaccharides 2. Breakdown polysaccharides w/ amylase secreted from salivary glands and pancreas starch breaks down to glucose glycogen breaks down to glucose
How does glucose enter the bloodstream? card 2 3. Breakdown disaccharides with membrane-bound enzymes in intestinal epithelium maltose breaks down to glucose + glucose sucrose breaks down to glucose + fructose lactose breaks down to glucose + galactose
How does glucose enter the bloodstream? card 3 4. Transport glucose from intestinal lumen epithelial cells (Na+-glucose symporter secondary active transport) 5. Transport glucose into blood stream by way of the liver (GLUT2 facilitated transport)
When serum glucose levels are average (4-8 mM) Basal glucose uptake into nearly all mammalian cells thru GLUT1 and 3 Kt = 1mM (low number indicates high affinity)
When serum glucose levels are high -Import into liver thru GLUT2 (Kt=20mM) liver synthesizes glycogen for storage -Import into pancreas thru GLUT2 pancreas secretes insulin into bloodstream -Insulin increases # of GLUT4 transporters (Kt=5mM) in muscle and adipose tissue
when serum glucose levels are high card 2 -Import into muscle tissue (glucose to glycogen) and adipose tissue (glucose and fat)
When serum glucose levels are low card 3 -Pancreas secretes glucagon into bloodstream this triggers liver to breakdown stored glycogen -Export glucose from liver thru GLUT2
Glycolysis Metabolic pathway required to breakdown glucose Process essentially universal; all living organisms and all kinds of cells
Breakdown of Glucose Yields two pyruvate molecules
Glycolysis Enzymes Located in Cytoplasm (10 steps)
Label a specific glucose carbon with C14 where does it end up? glucose carbon 1 glucose carbon 5
Why so many reactions? Glycolysis is a central pathway Most intermediates serve as branch points to other metabolic pathways
Why all the phosphorylation? Keeps the intracellular [glucose] low this leads to more glucose import Phosphorylated sugars can't use the GLUT transporters they are trapped in the cell Some of the intermediates will eventually tranfer P back to ADP to make ATP
Pyruvate in Aerobic Conditions pyruvate enters mitochondria this produces Acetyl coA citric acid cycle electron transport chain oxidative phosphorylation lots of ATP produced! "aerobic cellular respiration"
Pyruvate in Anaerobic conditions fermentation in yeast this yields ethanol (beer, wine) in microorganisms this yields lactic acid (yogurt) in aggressive tumors that outgrow their capillaries this yields lactic acid
Pyruvate in Anaerobic conditions card 2 in muscles during intense activity this leads to hypoxia this leads to lactic acid then <pH, then cramps and muscle fatigue(until lactic acid delivered to liver, reconverted to glucose: Cori cycle)
Regardless of Conditions fermentation in erythrocytes this produces lactic acid (no mitochondria to do citric acid cycle)
Fermentation regenerates NAD+ for continued glycolysis
Created by: anthony_lavell
Popular Biochemistry sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards