Test
Therapeutics and Investigation 1
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Preguntas del test (28)
1What type of radiation occurs when using ultrasonography?
- AMechanical
- BGamma
- CBeta
- DUltraviolet
- ESound
2What are the two types of waves that ultrasonography detects?
- ACompression
- BShear
- CSupression
- DTension
- EShort wavelength
3What is the region of frequency for ultrasonography?
- A1-20MHz
- B100-250MHz
- C1000-2500MHz
4What is absorption? (Ultrasonography)
- AWhen the US energy is converted into heat
- BWhen US energy is unable to be detect
- CWhen the US energy reaches a point and bounces back to the detector
5What factors can cause the amplitude to be reduced during an ultrasound? (Three answers)
- ATissue Properties
- BFrequency
- CDistance travelled
- DStrength of the wavelength
6Is this the correct definition for refraction?
When some or all energy is diverted from its original path- AVerdadero
- BFalso
7Is this the correct definition for diffraction?
Divergence of a beam from sound source- AVerdadero
- BFalso
8Is this the correct definition of Scatter?
Some energy is reflected from a boundary- AVerdadero
- BFalso
9Explain attenuation....
- AThe loss of power or amplitude of the ultrasound signal as it passes through tissue
- BThe ability for the ultrasound to 'attenuate' a low signal, thus making it more detectable
- CAttenuation = absorption + scatter + reflection
- DThis is the term given to the adaptation of the signal as it finds the target tissue.
10Tick all the different types of ultrasound scans
- AContinuous * pulsed wave
- BPulse-Echo principles (A-scan)
- CB-Mode image
- DTransmit focussing
- EFocused
- FSimple
- GZ-mode
11Is this the correct definition for the Doppler effect?
The difference between the transmitted frequency (Ft) and the received frequency (Fr)- AVerdadero
- BFalso
12Is it true that colour Dopplers show the difference between arteries and veins?
- AVerdadero
- BFalso
13Which of these are relevant to Power Doppler, but not Colour Doppler?
- AAngle independent
- BBetter Boundary detection
- CDetect Blood flow
- DImage noise in random flashes of colour
14Choose the benefits of using ultrasound...
- AReal-time Guidance
- BNon-ionising radiation
- CSpeed
- DPortable
15What is the correct equation for blood pressure?
- ACardiac output x Total peripheral resistance
- BCardiac output x aortic pressure
- CHeart rate x Stroke volume
16Tick the different layers of a blood vessel
- ATunica Media
- BTunica intima
- CTunia Adventitia
- DTunica medium
- ETunica interna
17Is it true or false that perivascular nerves are found on the outside of the tunica adventitia?
- AVerdadero
- BFalso
18Is this statement true?
When vascular smooth muscle relaxes vessel diameter decreases- AVerdadero
- BFalso
19What vessels are key in controlling resistance for circulation?
- ASmall arteries & arterioles
- Blarge arteries & arteriole
- CVeins
- DVenules
20Define; Isometric tension recording
- AMeasuring tension generated by the vascular wall with diameter of the vessel constantly changing.
- BMeasuring tension generated by the vascular wall with diameter of the vessel remaining constant
21Would isometric tension recording occur, in vitro or in vivo?
- AIn vitro
- Bin vivo
22Is this statement true?
Wire myography requires dissection skills and is better used for small vessels with an internal diameter of 100-400 micrometers.- AVerdadero
- BFalso
23What do changes in tension of a blood vessel indicate?
- AVasodilation
- BVasoconstriction
24Is this statement true?
Nitric Oxide is a signalling molecule in the cardiovascular system- AVerdadero
- BFalso
25Pick from the list below, the disadvantages of the cardiovascular techniques studied;
- ADifficulty in studying long term changes
- BCannot measure flow-induced relaxation
- CFreshly prepared vessels can be viable for hours
26What does a stretch in smooth muscle cause?
- ACauses muscle contraction
- BCauses a tear in the endothelial cells
- CCauses muscle relaxation
- DCauses a complex molecular signalling pathway that causing a release of further signalling substances
27Is this statement true?
Shear stress has frictional force on the endothelium leading to vasoconstriction- AVerdadero
- BFalso
28What causes the impairment in the sheer stress mechanism to cause vasoconstriction?
- ACardiovascular disease
- BAgeing
- CAtherosclerosis
- DRenal impairment
Información
- Descripción
- Revision tool for those studying Therapeutics and investigation 1, as a second year biomed studying at St Georges, This quiz has a range of different topics, but mainly focuses on experimental techniques used in the biomedical sciences degree.
- Autor
- Corey Briffa
- Idioma
- English
- Visitas
- 38
- Historial
- Creado el 5 ene 2015 · actualizado el 18 ene 2017
- Etiquetas
- Valoración
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