Biochemistry

Question 1

What is accuracy

Answer 1

How close a measurement is to its true value

Question 2

What is precision

Answer 2

How consistent a measurement of multiple samples is

Question 3

What is a reference interval

Answer 3

normal distribution graph with the upper and lower 2.5% cut off

Question 4

What is sensitivity of a biochemical test

Answer 4

how good it is at identifying disease

Question 5

what is pre analytical variation

Answer 5

diagnostic results that are influenced by other factors

Question 6

What is the reference value of [H]

Answer 6

35-45 nanomol/L

Question 7

what is the H equation

Answer 7

[H] α PCO2/[HCO3]

Question 8

what is acidaemia

Answer 8

increase in [H]

Question 9

what is alkalaemia

Answer 9

decrease in [H]

Question 10

what is acidosis

Answer 10

increase in [H] by a process

Question 11

what is alkalosis

Answer 11

decrease in [H] by a process

Question 12

What happens when there is too much H

Answer 12

lungs blow off CO2

Question 13

what happens when there is too much CO2

Answer 13

converted to H and excreted by kidneys

Question 14

Causes of respiratory acidosis

Answer 14

Choking
COPD
Bronchopneumonia

Question 15

Causes of respiratory alkalosis

Answer 15

mechanical overventilation
hyperventilation
raised ICP

Question 16

Causes of metabolic alkalosis

Answer 16

Loss of H in vomit
Alkali ingestion
Potassium deficiency

Question 17

Causes of metabolic acidosis

Answer 17

Impaired H secretion
Loss of bicarbonate
Increased H production or secretion