Biomedical Signal Processing Quiz

What is a signal?

• A signal is a single-valued representation of information as a function of an independent variable.

• A signal is a function of one or several variables that carries useful information.

• A signal may be a function of another variable besides time or even a function of two or more variables.

• A signal is said to be biological if it is recorded from a living system.

What are bioelectric signals?

• Specific types of biomedical signals obtained by electrodes.

• Signals that are not related to electrical potential.

• Signals that do not convey information.

• Signals that are only mechanical.

What is the action potential (AP)?

• The electrical signal generated by a single cell.

• The signal that is generated by multiple cells.

• The signal that does not propagate.

• The signal that is only chemical.

What does the ECG consist of?

• Waveforms that represent the polarisation, depolarization, and repolarization of the heart.

• Only the depolarization of the heart.

• Only the repolarization of the heart.

• No waveforms.

What is a phonocardiogram (PCG)?

• An audio recording of the heart's mechanical activity.

• A visual representation of the heart.

• A type of ECG.

• A measurement of blood pressure.

What is the frequency range and amplitude of Delta rhythm in EEG?

• 0.5-4 Hz, 20-200 mV

• 4-8 Hz, 10-100 mV

• 8-13 Hz, 10-200 mV

• 13-22 Hz, 1-20 mV

What is the primary function of the thalamus in the brain?

• Regulating body temperature

• Relay station for incoming sensory nerve impulses

• Managing heart rate

• Coordinating muscle action

What is the role of the hypothalamus?

• Regulating body temperature

• Processing visual images

• Controlling voluntary movements

• Managing speech and thought

What is the purpose of the electrodes in the 10-20 system of electrode placement?

• To measure brain activity

• To stimulate brain regions

• To provide electrical signals

• To monitor heart rate

What is the main source for EEG signals?

• Cortex of the cerebrum

• Brain stem

• Cerebellum

• Spinal cord