$($a$)$

The resonance frequency of the external fluid$-$filled catheter tube de$-$

pends on:

i$.$ Mass density of the fluid

ii$.$ Air in the fluid

iii. Diameter of the tube

iv$.$ All of the above

v$.$ None of the above

$($b$)$

An electromagnetic flowmeter measures:

i$.$ Cardiac output

ii$.$ Blood velocity

iii. Saturation of carbon dioxide

iv$.$ All of the above

v$.$ None of the above

$($c$)$ The Severinghaus electrode:

i$.$ Measures concentration of oxygen in a sample

ii$.$ Requires a membrane semi$-$permeable to carbon dioxide separating the

sample from a bicarbonate reference solution

iii. Requires a steady flow of the specimen through the sample chamber

iv$.$ All of the above

v$.$ None of the above

$($d$)$

A chemical fibrosensor:

i$.$ Is a type of optical sensor

ii$.$ Is capable of measuring fluorescence

iii. Is subject to Beer's law of volume absorptivity

iv$.$ All of the above

v$.$ None of the above