Past Qs 2 Flashcards Preview

Biochem > Past Qs 2 > Flashcards

Flashcards in Past Qs 2 Deck (306)
Loading flashcards...
1

What results from an increase in volume in ECF?

Overhydration

2

What results from decrease in volume in ECF

Dehydration

3

What results from increase in volume in plasma?

Hypervolaemia

4

What results from decrease in volume in plasma?

Hypovolaemia

5

What results from increase in volume in ISF?

Oedema

6

What is Isosmosis?

Constancy of Osmotic Pressure

7

What is Osmotic pressure?

force which prevents osmotic movement

8

What is Osmotic concentration?

Osmolarity; measure of osmols per litre

9

What is freezing point depression?

Difference between freezing point of pure solvent and solution with solute

10

Na+

a)in ECF= 140mmol/l
b)in ICF=27mmol/l

11

K+

a)in ECF=5.0mmol/l
b)in ICF=95mmol/l

12

Ca2+

a)in ECF=2.5 mmol/l
b)in ICF=1.0 mmol/l

13

Mg2+

a)in ECF=1.0mmol/l
b)in ICF= 3.0mmol/l

14

Cl-

a)in ECF=103mmol/l
b)in ICF=30mmol/l

15

HCO3

a)in ECF=27mmol/l
b)in ICF= 10mmol/l

16

HPO4

a)in ECF=1.5-2.0 mmol/l
b)in ICF=cca.30mmol/l

17

Proteinate in ECF and ICF

a)in ECF=16mmol/l
b)in ICF= 40-60 mmol/l

18

What is Isohydria?

Constancy of pH of ECF (pH=7.4)

19

What is the Henderson/Hasselbach eq.?

Ka=[H+]*log[A]/[HA] (weak ac=high pK,vice versa)

20

What pH classified as Acidosis?

7.0-7.35

21

What pH classified as Alkalosis?

7.45-7.8

22

What do buffer systems/pairs resist?

Change in pH (prevent shifts in H+ conc.)

23

What type of buffer system found mainly in ECF?

Bicarbonate Buffer System (Inorganic)

24

Which chemicals involved in buffer system of ECF?

Carbonic Acid (HCO3), Sodium Bicarbonate (NaHCO3)

25

What is eq. for pH?

pK=6.1 -> pH=6.1+ log20/1= 1.3+6.1= 7.4

26

What type of Buffer System found in ICF?

Phosphate Buffer System (Inorganic)

27

Which chemicals involved in Buffer system in ICF?

Dihydrogenase phosphate (H2PO4), Monohydrogen Phosphate (HPO4-)

28

What is eq. for pH?

pK=6.8 -> pH=6.8+log4/1=6.8+0.6= 7.4

29

What type of buffer system in plasma and ICF??

Protein Buffer System

30

What substances involved in Buffer System in plasma and ICF?

Plasma Proteins and Haemoglobin