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Phase 1 - S2 Metabolism, Endocrinology, Haematology > Energy in Cells > Flashcards

Flashcards in Energy in Cells Deck (28)
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1

what is metabolism

set of processes which drive energy and raw material production from food stuff to sustain life

2

what are catabolic reactions

ones that break down big molecules into smaller ones, releasing ATP

3

what are anabolic pathways

ones that synthesise larger cell components from intermediates using ATP

4

what is oxidation

loss of an electron or H atom

5

what is reduction

gain of an electron

6

true or false catabolic reactions are oxidative

true as they release H atoms

7

what is energy

the capacity to do work

8

what unit is energy measured in

joules

9

how many joules in 1 Kcal

4.20

10

true or false; carbohydrate contain the most energy

false, its actually fat

11

what type of energy is the main form of energy in cells

energy from the breaking of chemical bonds

12

what are exergonic reactions

reactions that release energy

13

what are endergonic reactions

reactions that produce energy

14

true or false; exergonic reactions have a negative change in free energy

true - this makes them spontaneous

15

what is NAD short for

nicotinamide adenine dinucleotide

16

what is NADP short for

nicotinamide adenine dinucleotide phosphate

17

what id FAD short for

Favin adenine dinucleotide

18

what do hydrogen carriers contain components of

b vitamins

19

how are hydrogen carriers reduced

by the addition of 2 H atoms (although one is then lost)

20

what is ATP composed of

adenine, ribose sugar and 3 phosphates

21

what does adenylate kinase catalyse

2ADP --> ATP + AMP

22

true or false; ATP, NADPH, NADH, FAD2H are high energy signal

true. these will cause an increase in anabolic processes to reduce to energy levels

23

what does creatine kinase catalyse

the transferring of a phosphate group from ATP to creatine to give phosphocreatine. It also catalyses the reverse

24

why does creatine kinase produce phosphocreatine

to store energy when there are high levels of ATP

25

what can creatine kinase be used to check for

myocardial infarctions

26

what is creatinine

the breakdown product of creatine in a spontaneous reaction which is then excreted in the kidneys

27

what is the concentration of creatinine in the kidneys proportional to

the muscle mass

28

true or false; creatine kinase can be used to see the dilution of the urine

true