Midterm test II.

Which corpuscular element of the blood has the highest concentration (under physiological conditions)?

• Red blood cells

• Granulocytes

• Lymphocytes

• Thrombocytes

What part of this circuit matters if we apply high-frequency alternating voltage for skin impedance measurement?

• Ohmic resistance (R1)

• Capacitive resistance (C1)

• Both of them (R1 and C1)

• Neither of them

What kind of X-ray has a line spectrum? (one word)

Which absorption process can be utilized to determine the photon energy of gamma-photons?

• Pair production

• Compton-scattering

• Photoeffect

• None of them

Which one has true unipolar leads?

• Einthoven's standard limb leads

• Wilson's chest leads

• Goldberger's augmented

• None of them

How many kHz is the lower limit of the ultrasound? Answer with one number, without a unit!

Which psychophysical principle describes a power function between the stimulus's strength and the triggered sense?

• Weber-Fechner

• Duan-Hunt

• Huygens-Fresnel

• Stevens

Which isotope can be used to determine the age of wines?

• C-14

• K-40

• H-3

• Cs-137