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Therapeutics and Investigation 1

Description

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.
Corey Briffa
Quiz by Corey Briffa, updated more than 1 year ago
Corey Briffa
Created by Corey Briffa almost 10 years ago
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Resource summary

Question 1

Question
What type of radiation occurs when using ultrasonography?
Answer
  • Mechanical
  • Gamma
  • Beta
  • Ultraviolet
  • Sound

Question 2

Question
What are the two types of waves that ultrasonography detects?
Answer
  • Compression
  • Shear
  • Supression
  • Tension
  • Short wavelength

Question 3

Question
What is the region of frequency for ultrasonography?
Answer
  • 1-20MHz
  • 100-250MHz
  • 1000-2500MHz

Question 4

Question
What is absorption? (Ultrasonography)
Answer
  • When the US energy is converted into heat
  • When US energy is unable to be detect
  • When the US energy reaches a point and bounces back to the detector

Question 5

Question
What factors can cause the amplitude to be reduced during an ultrasound? (Three answers)
Answer
  • Tissue Properties
  • Frequency
  • Distance travelled
  • Strength of the wavelength

Question 6

Question
Is this the correct definition for refraction? When some or all energy is diverted from its original path
Answer
  • True
  • False

Question 7

Question
Is this the correct definition for diffraction? Divergence of a beam from sound source
Answer
  • True
  • False

Question 8

Question
Is this the correct definition of Scatter? Some energy is reflected from a boundary
Answer
  • True
  • False

Question 9

Question
Explain attenuation....
Answer
  • The loss of power or amplitude of the ultrasound signal as it passes through tissue
  • The ability for the ultrasound to 'attenuate' a low signal, thus making it more detectable
  • Attenuation = absorption + scatter + reflection
  • This is the term given to the adaptation of the signal as it finds the target tissue.

Question 10

Question
Tick all the different types of ultrasound scans
Answer
  • Continuous * pulsed wave
  • Pulse-Echo principles (A-scan)
  • B-Mode image
  • Transmit focussing
  • Focused
  • Simple
  • Z-mode

Question 11

Question
Is this the correct definition for the Doppler effect? The difference between the transmitted frequency (Ft) and the received frequency (Fr)
Answer
  • True
  • False

Question 12

Question
Is it true that colour Dopplers show the difference between arteries and veins?
Image:
2c0952c5-fe6f-4993-93a0-a4e1b38280bd (image/jpg)
Answer
  • True
  • False

Question 13

Question
Which of these are relevant to Power Doppler, but not Colour Doppler?
Answer
  • Angle independent
  • Better Boundary detection
  • Detect Blood flow
  • Image noise in random flashes of colour

Question 14

Question
Choose the benefits of using ultrasound...
Answer
  • Real-time Guidance
  • Non-ionising radiation
  • Speed
  • Portable

Question 15

Question
What is the correct equation for blood pressure?
Answer
  • Cardiac output x Total peripheral resistance
  • Cardiac output x aortic pressure
  • Heart rate x Stroke volume

Question 16

Question
Tick the different layers of a blood vessel
Image:
e4d469ac-b736-45b7-8e56-dd533ac6f5bb (image/jpg)
Answer
  • Tunica Media
  • Tunica intima
  • Tunia Adventitia
  • Tunica medium
  • Tunica interna

Question 17

Question
Is it true or false that perivascular nerves are found on the outside of the tunica adventitia?
Answer
  • True
  • False

Question 18

Question
Is this statement true? When vascular smooth muscle relaxes vessel diameter decreases
Answer
  • True
  • False

Question 19

Question
What vessels are key in controlling resistance for circulation?
Answer
  • Small arteries & arterioles
  • large arteries & arteriole
  • Veins
  • Venules

Question 20

Question
Define; Isometric tension recording
Answer
  • Measuring tension generated by the vascular wall with diameter of the vessel constantly changing.
  • Measuring tension generated by the vascular wall with diameter of the vessel remaining constant

Question 21

Question
Would isometric tension recording occur, in vitro or in vivo?
Answer
  • In vitro
  • in vivo

Question 22

Question
Is this statement true? Wire myography requires dissection skills and is better used for small vessels with an internal diameter of 100-400 micrometers.
Answer
  • True
  • False

Question 23

Question
What do changes in tension of a blood vessel indicate?
Answer
  • Vasodilation
  • Vasoconstriction

Question 24

Question
Is this statement true? Nitric Oxide is a signalling molecule in the cardiovascular system
Answer
  • True
  • False

Question 25

Question
Pick from the list below, the disadvantages of the cardiovascular techniques studied;
Answer
  • Difficulty in studying long term changes
  • Cannot measure flow-induced relaxation
  • Freshly prepared vessels can be viable for hours

Question 26

Question
What does a stretch in smooth muscle cause?
Answer
  • Causes muscle contraction
  • Causes a tear in the endothelial cells
  • Causes muscle relaxation
  • Causes a complex molecular signalling pathway that causing a release of further signalling substances

Question 27

Question
Is this statement true? Shear stress has frictional force on the endothelium leading to vasoconstriction
Answer
  • True
  • False

Question 28

Question
What causes the impairment in the sheer stress mechanism to cause vasoconstriction?
Answer
  • Cardiovascular disease
  • Ageing
  • Atherosclerosis
  • Renal impairment
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