Module 6: Energy Metabolism

Question 1

Energy metabolism

Answer 1

pathways involved in the generation or

storage of metabolic energy

Question 2

Fuel

Answer 2

comes from our diet or fuel reserves in our body

Question 3

Lipids

Answer 3

Basic building block: free fatty acid

Storage: Three fatty acids are esterified with a molecule of glycerol to form a triglyceride

Question 4

Carbohydrates

Answer 4

Basic building block: glucose

Storage: Glucose molecules linked together to form a very large molecule of glycogen

Question 5

Proteins

Answer 5

Basic building block: amino acid
Storage*: muscle protein
*not really stored

Question 6

ATP

Answer 6

energy currency of the cell
broken down to ADP and inorganic phosphate (Pi), while releasing free energy that drives certain rxns/processes inside the cell

Question 7

What source of energy does the brain prefer?

Answer 7

glucose

Question 8

What source of energy do the muscles prefer?

Answer 8

muscle also loves glucose during high intensity exercise, but at rest or during low intensity exercise, it is satisfied by the breakdown of lipids

Question 9

Catabolism

Answer 9

Breakdown of macronutrients (all) through oxidation
Generates reducing equivalents (NADH, FADH2) and energy (ATP)
Catalyzed by dehydrogenase

EX: glucose–>pyruvate via glycolysis–>acetyl CoA–>CO2 via CAC

Question 10

Anabolism

Answer 10

Reductive biosynthesis of carbohydrates and lipids
Utilizes reducing equivalents (NADPH) and energy (ATP)
Catalyzed by reductases

EX: gluconeogenesis

Question 11

Pathway

Answer 11

comprised of a sequential series of reactions in a cell that are catalyzed by
enzymes
Upper case letters =molecules/metabolic intermediates
Number superscript=enzyme that catalyzes the conversion of one intermediate to the next