WorksheetsaGAPPE_FINAL
Total questions: 38
Worksheet time: 39mins
What is the primary fluid analyzed by smart contact lenses for biomarker detection?
Aqueous humor
Blood plasma
Cerebrospinal fluid
Tear fluid
Which material is commonly used in smart contact lenses due to its transparency and stretchability?
PET
Graphene
PDMS
Polycarbonate
Which component in a smart contact lens is primarily responsible for controlled drug delivery?
Wireless transmission module
Microfluidic system
Optical filter
Biosensor array
What type of power supply is commonly explored for use in smart contact lenses?
Alkaline coin cells
Inductive or solar energy harvesters
Lithium-ion pouch cells
Kinetic energy converters
Capnography transducers are crucial in measuring:
Nitrogen concentration
Carbon monoxide level
Oxygen saturation
Carbon dioxide concentration
What type of sensor is used in chest wall movement detection via inductive plethysmography?
Piezoelectric sensor
Optical sensor
Temperature-based sensor
Flow sensor
Inductive plethysmography used in chest wall movement sensors operates based on:
Voltage change in a thermistor loop
Variations in magnetic inductance due to chest expansion
Resistance change due to pressure on a strain gauge
Piezoelectric charge generation by skin vibration
The Snuza Hero MD uses which of the following technologies to detect breathing motion?
Thermocouple sensor
Optical sensor
Piezoelectric motion sensor
Microphone sensor
Which type of biosensor operates by measuring current produced during redox reactions?
Potentiometric
Impedimetric
Amperometric
Optical
In optical biosensors, Surface Plasmon Resonance (SPR) is used to detect:
Thermal expansion
Frequency shifts in vibrations
Refractive index changes due to molecular binding
Dielectric property changes between electrodes
The main advantage of microfluidic-based biosensors is:
High-temperature resistance
Increased noise immunity
Low sample volume and rapid analysis
Compatibility with magnetic fields
Which of the following acts as the biological interface in a MEMS biosensor, enabling specific interaction with the target analyte?
Cantilever array
Biorecognition element
Signal conditioning unit
Microelectrode transducer
Which principle is used by ultrasonic flow transducers to measure flow?
Bernoulli’s Principle
Doppler Effect
Fick’s Law
Ohm’s Law
What is a major advantage of MEMS-based flow sensors in biomedical applications?
High radiation tolerance
Ability to be implanted for long-term monitoring
Provide non-specific flow readings suitable for multiple fluids
Require large power supplies due to onboard heating elements
Which flow transducer is most appropriate for accurately detecting bidirectional low-volume air flow in sleep studies?
Thermal flow transducer
Turbine flow transducer
Capacitive sensor
Optical Doppler sensor
Why are MEMS-based flow sensors particularly suitable for cardiac post-operative monitoring?
They are calibrated externally using ECG signals
They allow real-time visualization of pulmonary pressure
They can be implanted for continuous blood flow monitoring with low power demand
They are based on Bernoulli’s principle for turbulence detection
Which of the following is a major advantage of optical sensors in biomedical diagnostics?
High electrical conductivity
Ability to generate metabolic heat
Non-invasive and highly specific detection
photobleaching property
Which application best demonstrates the use of Lab-on-Chip (LOC) technology?
Wireless ECG patch for heart rate
Cancer biomarker screening using microfluidic platforms
Thermal imaging of skin lesions
MRI-compatible glucose sensors
What challenge is particularly critical for long-term use of implantable chemical sensors?
Excessive power consumption
Biofouling due to protein and cell accumulation
Poor response time
Over-sensitivity to oxygen
Which type of chemical sensor is most appropriate for continuous glucose monitoring in diabetic patients?
Optical sensor
Biosensor with enzymatic electrochemical transduction
Thermal sensor
Gas sensor using metal-oxide semiconductors
What is the key advantage of combining microactuation with microfluidics in MEMS drug delivery systems?
Increased drug solubility
Rapid wound healing
Controlled and programmable drug release
Reduction in drug cost
Which transducer is commonly used in MEMS insulin pumps to pump insulin based on sensor feedback?
Magnetic actuator
Electrothermal actuator
Piezoelectric actuator
Capacitive pressure sensor
What type of actuator is used in MEMS-based pain management implants for drug release via remote control?
Piezoelectric actuator
Magnetic or RF actuator
Thermal bimetallic actuator
Pneumatic valve actuator
What makes biodegradable MEMS implants highly suitable for hormone replacement therapy?
Reusability
pH-sensing feedback loop
No need for surgical removal after therapy
High power actuation
What role do photodiodes play in optical sensors such as pulse oximeters?
Emit infrared light
Measure electrical capacitance
Detect light absorption and convert it to an electrical signal
Provide mechanical amplification
Which type of optical sensor is used for capturing high-resolution cross-sectional images of tissue layers?
Fluorescence biosensor
Photoplethysmography sensor
Fiber optic sensor
Optical Coherence Tomography (OCT)
What is a key advantage of fluorescence-based biosensors in cancer detection?
Cost-effective but low sensitivity
High thermal resolution
Specific detection using tagging
Inability to operate in vivo
Which biomedical application most commonly uses photoplethysmography (PPG) sensors?
Retinal imaging
Blood volume and pulse monitoring
GI tract imaging
pH sensing
What role does the pressure transducer play in a smart infusion pump system?
Real-time temperature tracking
Detecting flow resistance or catheter blockage
Displaying drug expiry data
Infusion scheduling only
Which component in infusion pumps converts motor rotation into compressive motion for drug delivery?
Piezoelectric diaphragm
Solenoid plunger
Peristaltic mechanism
Capillary nozzle
Which feature makes optical transducers particularly suitable for oxygen sensing and optical biopsy?
High electrical resistance
Rapid change in acoustic amplitude
Sensitivity to light absorption and fluorescence
Piezoelectric signal generation
Which type of implantable transducer is most likely to include a microfluidic interface for analyte control?
Neural transducer
Pressure transducer
Chemical or biosensor
Acoustic transducer
Which of the following implantable sensors is most suited for real-time glucose monitoring over long durations?
Piezoelectric acoustic sensor
Capacitive pressure transducer
Optical biosensor
Thermocouple-based sensor
Which engineering term describes the property that allows implantable sensors to remain functional without tissue rejection?
(a)
Which sensing principle in MEMS relies on voltage generation under mechanical strain?
Capacitive sensing
Piezoresistive sensing
Piezoelectric sensing
Optical sensing
MEMS accelerometers are primarily used in biomedical applications for:
Detecting glucose fluctuations
Monitoring body movements and fall detection
Analyzing blood oxygen concentration
Delivering localized thermal therapy
Which MEMS advancement allows rapid COVID-19 or cancer diagnostics by integrating sample prep and detection on a single platform?
MEMS neural sensors
Self-powered sensors
Lab-on-a-Chip (BioMEMS)
MEMS microphones
What is the key property that enables nano biosensors with quantum dots to detect molecules like DNA at very low concentrations?
Thermal stability
Large physical size
Ultra-high sensitivity
Mechanical durability
