Metabolism and Lactic Acid

Question 1

what is metabolism?

Answer 1

all the chemical reactions in the cells of an organism, including respiration

Question 2

metabolic reaction #1 (synthesis)

Answer 2

the conversion of glucose to starch, glycogen, and cellulose

Question 3

metabolic reaction #2 (synthesis)

Answer 3

formation of lipid molecules from a molecule of glycerol and three fatty acid molecules

Question 4

metabolic reaction #3 (synthesis)

Answer 4

the use of glucose and nitrate ions to form amino acids that are then used to make proteins

Question 5

metabolic reaction #4 (breakdown)

Answer 5

the reactions of respiration

Question 6

metabolic reaction #5 (synthesis)

Answer 6

the reactions of photosynthesis

Question 7

metabolic reaction #6 (breakdown)

Answer 7

the breakdown of excess proteins in the liver to form urea for excretion in the urine by kidneys

Question 8

what is a breakdown reaction?

Answer 8

making smaller molecules from larger ones. usually do not require much energy

Question 9

what is a synthesis reaction?

Answer 9

build up of larger, more complicated molecules. they require energy from respiration

Question 10

can metabolism vary?

Answer 10

yes. it depends on genetics, gender, age, proportion of muscle to fat, external temperature, exercise

Question 11

explain the external temperature example

Answer 11

if it decreases it can cause an increase in the metabolic rate, so as to create the extra heat needed to maintain the body’s internal temperature

Question 12

what are the liver’s metabolic functions?

Answer 12

detoxifying poisonous substances eg ethanol

Question 13

what else does the liver do?

Answer 13

break down excess proteins to form urea for excretion and convert lactic acid to glucose