Top 50 Bio- Medical Instrumentation Objective Questions and Answers
Top 50 Bio- Medical Instrumentation Objective Questions and Answers
1. Source of Bioelectric potential is
a) mechanical
b) electronic
c) electric
d) ionic
Answer: ionic
2. Principal ion that is not involved with the phenomena of producing cell potentials is
a) potassium
b) chlorine
c) hydrogen
d) sodium
Answer: hydrogen
3. ________ is the relatively static membrane potential of quiescent cells.
a) resting membrane potential
b) half-cell potential
c) cell potential
d) action potential
Answer: resting membrane potential
4. The variation of the electrical potential associated with the passage of a pulse along the membrane of a muscle cell or a nerve cell is called
a) resting potential
b) half cell potential
c) action potential
d) muscle potential
Answer: action potential
5. After a cell is stimulated, a finite period of time is required for the cell to return to its pre-stimulus state, period is known as
a) refactory period
b) regain period
c) regenerative period
d) restoration period
Answer: refactory period
6. Electrooculography is a technique for measuring
a) respiration rate
b) cornea-retinal standing potential
c) abnormal function of the retina
d) heart rate
Answer: cornea-retinal standing potential
7. Palsied muscles mean
a) involuntary muscles
b) paralyzed muscles
c) active muscles
d) voluntary muscles
Answer: paralyzed muscles
8. Phonocardiography is related to
a) heart sound
b) lungs sound
c) tract sound
d) muscle sound
Answer: heart sound
9. Electrodes transfer from the __________ in the tissue to the electronic conduction necessary to measure
a) electric conduction
b) ionic conduction
c) impulsive conduction
d) electronic conduction
Answer: ionic conduction
10. Deep-seated electrodes indicates the electric potential difference arising ________ the living tissues
a) outside
b) inside
c) Both a and b
d) around
Answer: inside
11. Electrode paste
a) reduces contact impedance
b) equates contact impedance
c) absorbs contact impedance
d) increases contact impedance
Answer: reduces contact impedance
12. All electrode potentials are measured with respect to which reference electrode
a) platinum electrode
b) calomel electrode
c) hydrogen absorbed on platinum electrode
d) hydrogen electrode
Answer: hydrogen absorbed on platinum electrode
13. Impedance pneumography is a commonly-used technique to monitor a person’s
a) heart rate
b) skin impedance
c) respiration rate
d) pulse rate
Answer: respiration rate
14. _______ is the frequency range of ECG
a) 5-120 Hz
b) 0.05-120 Hz
c) 12-120 Hz
d) 70-120 Hz
Answer: 0.05-120 Hz
15. ________ is the signal amplitude of EEG
a) 2-200mV
b) 2-2000 µV
c) 2-2000mV
d) 2-200 µV
Answer: 2-200 µV
16. Needle electrode is used to measure
a) EMG
b) EOG
c) EEG
d) EKG
Answer: EMG
17. Off-set potential is
a) sum of half-cell potentials between two electrodes
b) average of half-cell potentials between two electrodes
c) complement of half-cell potentials between two electrodes
d) difference in half-cell potentials between two electrodes
Answer: difference in half-cell potentials between two electrodes
18. ____ It ____ statement is false about polarizable electrodes
a) retain a residual charge when exposed to large pulse of energy
b) transmit small bioelectric signals even after getting exposed to large pulse of energy
c) used for recording resting ECG
d) made using stainless steel
Answer: transmit small bioelectric signals even after getting exposed to large pulse of energy
19. ________ gas saturation is of great importance in clinical practice
a) carbon dioxide
b) nitrogen
c) oxygen
d) hydrogen
Answer: oxygen
20. Technique involves measuring the optical transmittance of the ear at how many wavelengths
a) 8
b) 12
c) 10
d) 20
Answer: 8
21. ________ is considered to be the primary pacemaker of the heart
a) atrio-ventricular node
b) bundle of his
c) purkinje fibres
d) sino-atrial node
Answer: sino-atrial node
22. Atrio ventricular node is located at
a) lower part of the heart wall between the two atrial
b) upper part of the heart wall above the two atrial
c) lower part of the heart wall above the two atrial
d) upper part of the heart wall between the two atrial
Answer: lower part of the heart wall between the two atrial
23. Buffer amplifier converts
a) ac impedance signals to dc impedance signals
b) dc impedance signals to ac impedance signals
c) low impedance signals to high impedance signals
d) high impedance signals to low impedance signals
Answer: high impedance signals to low impedance signals
24. Before placing the electrodes the skin should be
a) oily
b) dry
c) wet
d) hairy
Answer: dry
25. Contraction of the skeletal muscles results in the generation of action potential in the individual muscle fibers, record of action potential is called
a) EEG
b) EKG
c) EMG
d) ECG
Answer: EMG
26. In voluntary contraction of the skeletal muscles, the muscle potential ranges
a) 50 mV – 5 V
b) 0.05 uV – 2 mV
c) 50 uV – 5 mV
d) 50 mV – 500 mV
Answer: 50 uV – 5 mV
27. Using a _________ rather than a _________ the amplitude of low frequency noise as well as the low frequency components of the ECG will be reduced without affecting the QRS
a) Band-pass filter, High-pass filter
b) Band-pass filter, Low-pass filter
c) Low-pass filter, Band-pass filter
d) High-pass filter, Band-pass filter
Answer: Band-pass filter, Low-pass filter
28. The tympanic membrane separates the ear canal from
a) middle ear cavity
b) upper ear cavity
c) inner ear cavity
d) lower ear cavity
Answer: middle ear cavity
29. The middle ear is exposed to atmospheric pressure only through the
a) tympanic membrane
b) eustachian tube
c) auditory nerve
d) pinna
Answer: eustachian tube
30. The major function of the middle ear is
a) transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear
b) transfer movements of the air in the outer ear to the tympanic membrane
c) transfer movements of the air in the outer ear to the auditory nerves
d) transfer movements of the air in the outer ear to the cochlea
Answer: transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear
31. The human ear responses to vibrations ranging from
a) 2Hz – 2KHz
b) 20Hz – 20KHz
c) 2KHz – 20MHz
d) 20KHz – 20MHz
Answer: 20Hz – 20KHz
32. ________bone that rests upon the lower end of the cochlea and passes the vibrations directly into the fluid within
a) malleus
b) hammer
c) incus
d) stapes
Answer: stapes
33. ________is specialized equipment, which is used for the identification of hearing the loss in individuals
a) tachometer
b) manometer
c) audiometer
d) gaugemeter
Answer: audiometer
34. ________threshold of hearing is measured by a pure-tone audiometer
a) air-conduction and bone-conduction thresholds of hearing
b) speech reception thresholds for diagnostic purposes
c) bone-conduction thresholds of hearing
d) air-conduction thresholds of hearing
Answer: air-conduction and bone-conduction thresholds of hearing
35. Speech audiometers are normally used to determine
a) bone-conduction thresholds of hearing
b) speech reception thresholds for diagnostic purposes
c) air-conduction thresholds of hearing
d) air-conduction and bone-conduction thresholds of hearing
Answer: speech reception thresholds for diagnostic purposes
36. Pure-tone audiometers usually generate test tones in octave steps from
a) 125 to 800 Hz
b) 25 to 8000 Hz
c) 125 to 8000 Hz
d) 15 to 800 Hz
Answer: 125 to 8000 Hz
37. ________is unit of sensitivity of an electrocardiograph
a) m/V
b) mm/mV
c) mm/V
d) m/mV
Answer: mm/mV
38. Blood pressure is measured in terms of
a) Hg
b) cm Hg
c) mm
d) mm Hg
Answer: mm Hg
39. Blinking of an eye is an example of
a) Spinal refluxes
b) Relay neurons
c) Cranial refluxes
d) Spinal reflux
Answer: Cranial refluxes
40. The inner most layer of human eye is
a) Choroid
b) Retina
c) Sclera
d) Cornea
Answer: Retina
41. Color blindness is due to defect in
a) Rods and cons
b) Cones
c) Rhodopsin
d) Rods
Answer: Cones
42. Total lung capacity is
a) 3000-6000ml
b) 4000-5500ml
c) 2500-5000ml
d) 5000-6000ml
Answer: 5000-6000ml
43. The amount of CO2 in expired air is
a) 3.6%
b) 21%
c) 0.03%
d) 0.04%
Answer: 3.6%
44. Vital capacity of lung is
a) IRV+ERV
b) TV+IRV+ERV
c) TV+ERV
d) TV+IRV+RV
Answer: TV+IRV+ERV
45. Pulmonary ventilation movements are due to
a) Diaphragm
b) Wall of lungs
c) Costal muscles
d) Costal muscles and diaphragm
Answer: Costal muscles and diaphragm
46. After deep inspiration maximum expiration of lungs is called
a) Total lung capacity
b) Functional residual capacity
c) Vital capacity
d) Inspiratory capacity
Answer: Vital capacity
47. ________system is not regulated by a centre in the medulla oblongata
a) immune system
b) respiratory system
c) digestive system
d) cardiovascular system
Answer: immune system
48. Gas exchange in lungs occurs in
a) Bronchioles
b) Alveolar sacs
c) Alveolar sinus
d) Segmental Bronchi
Answer: Alveolar
49. Residual volume in lungs of an average human is
a) 1000 ml
b) 3-4.5 ml
c) 1500 ml
d) 500 ml
Answer: 1200 ml ( 1500 ml)
50. Respiration involves one of the following sets of processes
a) Aspiration, Inspiration, Expiration
b) External, Internal and Expiration
c) Inspiration, exchange of gases, Expiration
d) None of the above
Answer: Inspiration, exchange of gases, Expiration
a) mechanical
b) electronic
c) electric
d) ionic
Answer: ionic
2. Principal ion that is not involved with the phenomena of producing cell potentials is
a) potassium
b) chlorine
c) hydrogen
d) sodium
Answer: hydrogen
3. ________ is the relatively static membrane potential of quiescent cells.
a) resting membrane potential
b) half-cell potential
c) cell potential
d) action potential
Answer: resting membrane potential
4. The variation of the electrical potential associated with the passage of a pulse along the membrane of a muscle cell or a nerve cell is called
a) resting potential
b) half cell potential
c) action potential
d) muscle potential
Answer: action potential
5. After a cell is stimulated, a finite period of time is required for the cell to return to its pre-stimulus state, period is known as
a) refactory period
b) regain period
c) regenerative period
d) restoration period
Answer: refactory period
6. Electrooculography is a technique for measuring
a) respiration rate
b) cornea-retinal standing potential
c) abnormal function of the retina
d) heart rate
Answer: cornea-retinal standing potential
7. Palsied muscles mean
a) involuntary muscles
b) paralyzed muscles
c) active muscles
d) voluntary muscles
Answer: paralyzed muscles
8. Phonocardiography is related to
a) heart sound
b) lungs sound
c) tract sound
d) muscle sound
Answer: heart sound
9. Electrodes transfer from the __________ in the tissue to the electronic conduction necessary to measure
a) electric conduction
b) ionic conduction
c) impulsive conduction
d) electronic conduction
Answer: ionic conduction
10. Deep-seated electrodes indicates the electric potential difference arising ________ the living tissues
a) outside
b) inside
c) Both a and b
d) around
Answer: inside
11. Electrode paste
a) reduces contact impedance
b) equates contact impedance
c) absorbs contact impedance
d) increases contact impedance
Answer: reduces contact impedance
12. All electrode potentials are measured with respect to which reference electrode
a) platinum electrode
b) calomel electrode
c) hydrogen absorbed on platinum electrode
d) hydrogen electrode
Answer: hydrogen absorbed on platinum electrode
13. Impedance pneumography is a commonly-used technique to monitor a person’s
a) heart rate
b) skin impedance
c) respiration rate
d) pulse rate
Answer: respiration rate
14. _______ is the frequency range of ECG
a) 5-120 Hz
b) 0.05-120 Hz
c) 12-120 Hz
d) 70-120 Hz
Answer: 0.05-120 Hz
15. ________ is the signal amplitude of EEG
a) 2-200mV
b) 2-2000 µV
c) 2-2000mV
d) 2-200 µV
Answer: 2-200 µV
16. Needle electrode is used to measure
a) EMG
b) EOG
c) EEG
d) EKG
Answer: EMG
17. Off-set potential is
a) sum of half-cell potentials between two electrodes
b) average of half-cell potentials between two electrodes
c) complement of half-cell potentials between two electrodes
d) difference in half-cell potentials between two electrodes
Answer: difference in half-cell potentials between two electrodes
18. ____ It ____ statement is false about polarizable electrodes
a) retain a residual charge when exposed to large pulse of energy
b) transmit small bioelectric signals even after getting exposed to large pulse of energy
c) used for recording resting ECG
d) made using stainless steel
Answer: transmit small bioelectric signals even after getting exposed to large pulse of energy
19. ________ gas saturation is of great importance in clinical practice
a) carbon dioxide
b) nitrogen
c) oxygen
d) hydrogen
Answer: oxygen
20. Technique involves measuring the optical transmittance of the ear at how many wavelengths
a) 8
b) 12
c) 10
d) 20
Answer: 8
21. ________ is considered to be the primary pacemaker of the heart
a) atrio-ventricular node
b) bundle of his
c) purkinje fibres
d) sino-atrial node
Answer: sino-atrial node
22. Atrio ventricular node is located at
a) lower part of the heart wall between the two atrial
b) upper part of the heart wall above the two atrial
c) lower part of the heart wall above the two atrial
d) upper part of the heart wall between the two atrial
Answer: lower part of the heart wall between the two atrial
23. Buffer amplifier converts
a) ac impedance signals to dc impedance signals
b) dc impedance signals to ac impedance signals
c) low impedance signals to high impedance signals
d) high impedance signals to low impedance signals
Answer: high impedance signals to low impedance signals
24. Before placing the electrodes the skin should be
a) oily
b) dry
c) wet
d) hairy
Answer: dry
25. Contraction of the skeletal muscles results in the generation of action potential in the individual muscle fibers, record of action potential is called
a) EEG
b) EKG
c) EMG
d) ECG
Answer: EMG
26. In voluntary contraction of the skeletal muscles, the muscle potential ranges
a) 50 mV – 5 V
b) 0.05 uV – 2 mV
c) 50 uV – 5 mV
d) 50 mV – 500 mV
Answer: 50 uV – 5 mV
27. Using a _________ rather than a _________ the amplitude of low frequency noise as well as the low frequency components of the ECG will be reduced without affecting the QRS
a) Band-pass filter, High-pass filter
b) Band-pass filter, Low-pass filter
c) Low-pass filter, Band-pass filter
d) High-pass filter, Band-pass filter
Answer: Band-pass filter, Low-pass filter
28. The tympanic membrane separates the ear canal from
a) middle ear cavity
b) upper ear cavity
c) inner ear cavity
d) lower ear cavity
Answer: middle ear cavity
29. The middle ear is exposed to atmospheric pressure only through the
a) tympanic membrane
b) eustachian tube
c) auditory nerve
d) pinna
Answer: eustachian tube
30. The major function of the middle ear is
a) transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear
b) transfer movements of the air in the outer ear to the tympanic membrane
c) transfer movements of the air in the outer ear to the auditory nerves
d) transfer movements of the air in the outer ear to the cochlea
Answer: transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear
31. The human ear responses to vibrations ranging from
a) 2Hz – 2KHz
b) 20Hz – 20KHz
c) 2KHz – 20MHz
d) 20KHz – 20MHz
Answer: 20Hz – 20KHz
32. ________bone that rests upon the lower end of the cochlea and passes the vibrations directly into the fluid within
a) malleus
b) hammer
c) incus
d) stapes
Answer: stapes
33. ________is specialized equipment, which is used for the identification of hearing the loss in individuals
a) tachometer
b) manometer
c) audiometer
d) gaugemeter
Answer: audiometer
34. ________threshold of hearing is measured by a pure-tone audiometer
a) air-conduction and bone-conduction thresholds of hearing
b) speech reception thresholds for diagnostic purposes
c) bone-conduction thresholds of hearing
d) air-conduction thresholds of hearing
Answer: air-conduction and bone-conduction thresholds of hearing
35. Speech audiometers are normally used to determine
a) bone-conduction thresholds of hearing
b) speech reception thresholds for diagnostic purposes
c) air-conduction thresholds of hearing
d) air-conduction and bone-conduction thresholds of hearing
Answer: speech reception thresholds for diagnostic purposes
36. Pure-tone audiometers usually generate test tones in octave steps from
a) 125 to 800 Hz
b) 25 to 8000 Hz
c) 125 to 8000 Hz
d) 15 to 800 Hz
Answer: 125 to 8000 Hz
37. ________is unit of sensitivity of an electrocardiograph
a) m/V
b) mm/mV
c) mm/V
d) m/mV
Answer: mm/mV
38. Blood pressure is measured in terms of
a) Hg
b) cm Hg
c) mm
d) mm Hg
Answer: mm Hg
39. Blinking of an eye is an example of
a) Spinal refluxes
b) Relay neurons
c) Cranial refluxes
d) Spinal reflux
Answer: Cranial refluxes
40. The inner most layer of human eye is
a) Choroid
b) Retina
c) Sclera
d) Cornea
Answer: Retina
41. Color blindness is due to defect in
a) Rods and cons
b) Cones
c) Rhodopsin
d) Rods
Answer: Cones
42. Total lung capacity is
a) 3000-6000ml
b) 4000-5500ml
c) 2500-5000ml
d) 5000-6000ml
Answer: 5000-6000ml
43. The amount of CO2 in expired air is
a) 3.6%
b) 21%
c) 0.03%
d) 0.04%
Answer: 3.6%
44. Vital capacity of lung is
a) IRV+ERV
b) TV+IRV+ERV
c) TV+ERV
d) TV+IRV+RV
Answer: TV+IRV+ERV
45. Pulmonary ventilation movements are due to
a) Diaphragm
b) Wall of lungs
c) Costal muscles
d) Costal muscles and diaphragm
Answer: Costal muscles and diaphragm
46. After deep inspiration maximum expiration of lungs is called
a) Total lung capacity
b) Functional residual capacity
c) Vital capacity
d) Inspiratory capacity
Answer: Vital capacity
47. ________system is not regulated by a centre in the medulla oblongata
a) immune system
b) respiratory system
c) digestive system
d) cardiovascular system
Answer: immune system
48. Gas exchange in lungs occurs in
a) Bronchioles
b) Alveolar sacs
c) Alveolar sinus
d) Segmental Bronchi
Answer: Alveolar
49. Residual volume in lungs of an average human is
a) 1000 ml
b) 3-4.5 ml
c) 1500 ml
d) 500 ml
Answer: 1200 ml ( 1500 ml)
50. Respiration involves one of the following sets of processes
a) Aspiration, Inspiration, Expiration
b) External, Internal and Expiration
c) Inspiration, exchange of gases, Expiration
d) None of the above
Answer: Inspiration, exchange of gases, Expiration
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